Debt	3 Months Ended
Mar. 31, 2026
Long-Term Debt, Unclassified [Abstract]
Subordinated Borrowings Disclosure	Subordinated Notes On February 1, 2026, following the acquisition of First Citizens, Park assumed the role of successor to First Citizens in several Trust Agreements and Junior Subordinated Indentures related to the issuance of subordinated notes. The agreements are summarized in the following paragraphs. First Citizens Subordinated Notes In March 2005, First Citizens formed First Citizens (TN) Statutory Trust III ("FC Trust III"), a Delaware statutory trust, which issued $5.0 million of FC Trust III's floating rate preferred securities (the “FC III Trust Preferred Securities”) to institutional investors. These FC III Trust Preferred Securities qualify as Tier I capital under FRB guidelines. All of the common securities of FC Trust III are owned by Park. The proceeds from the issuance of the common securities and the FC III Trust Preferred Securities were used by FC Trust III to purchase $5.2 million of junior subordinated notes, which, following the cessation of LIBOR on June 30, 2023, carry a floating rate based on three-month CME Term SOFR plus 206 basis points. The junior subordinated notes represent the sole asset of FC Trust III. The FC Trust III Preferred Securities accrue and pay distributions at a floating rate of three-month CME Term SOFR plus 206 basis points per annum. The FC Trust III Trust Preferred Securities are mandatorily redeemable upon maturity of the junior subordinated notes in March 2035, or upon earlier redemption as provided in the junior subordinated notes. Since March 2010, the junior subordinated notes purchased by FC Trust III have been available to be redeemed, in whole or in part. As specified in the indenture, if the junior subordinated notes are redeemed prior to maturity, the redemption price will be the principal amount, plus any unpaid accrued interest. In accordance with U.S. GAAP, FC Trust III is not consolidated with Park’s financial statements, but rather the subordinated notes are reflected as a liability. In March 2007, First Citizens formed First Citizens (TN) Statutory Trust IV ("FC Trust IV"), a Delaware statutory trust, which issued $5.0 million of FC Trust IV's floating rate preferred securities (the “FC IV Trust Preferred Securities”) to institutional investors. These FC IV Trust Preferred Securities qualify as Tier I capital under FRB guidelines. All of the common securities of FC Trust IV are owned by Park. The proceeds from the issuance of the common securities and the FC IV Trust Preferred Securities were used by FC Trust IV to purchase $5.2 million of junior subordinated notes, which, following the cessation of LIBOR on June 30, 2023, carry a floating rate based on three-month CME Term SOFR plus 201 basis points. The junior subordinated notes represent the sole asset of FC Trust IV. The FC Trust IV Preferred Securities accrue and pay distributions at a floating rate of three-month CME Term SOFR plus 201 basis points per annum. The FC Trust IV Trust Preferred Securities are mandatorily redeemable upon maturity of the junior subordinated notes in June 2037, or upon earlier redemption as provided in the junior subordinated notes. Since March 2012, the junior subordinated notes purchased by FC Trust IV have been available to be redeemed, in whole or in part. As specified in the indenture, if the junior subordinated notes are redeemed prior to maturity, the redemption price will be the principal amount, plus any unpaid accrued interest. In accordance with U.S. GAAP, FC Trust IV is not consolidated with Park’s financial statements, but rather the subordinated notes are reflected as a liability. Pursuant to First Citizens merger with Southern Heritage Bancshares on October 1, 2014, First Citizens assumed the debentures issued to Southern Heritage Statutory Trust I ("SH Trust I"). In December 2004, Southern Heritage Bancshares formed SH Trust I, a Delaware statutory trust, which issued $5.0 million of SH Trust I's floating rate preferred securities (the “SH I Trust Preferred Securities”) to institutional investors. These SH I Trust Preferred Securities qualify as Tier I capital under FRB guidelines. All of the common securities of SH Trust I are owned by Park. The proceeds from the issuance of the common securities and the SH I Trust Preferred Securities were used by SH Trust I to purchase $5.2 million of junior subordinated notes, which, following the cessation of LIBOR on June 30, 2023, carry a floating rate based on three-month CME Term SOFR plus 231 basis points. The junior subordinated notes represent the sole asset of SH Trust I. The SH I Preferred Securities accrue and pay distributions at a floating rate of three-month CME Term SOFR plus 231 basis points per annum. The SH Trust I Trust Preferred Securities are mandatorily redeemable upon maturity of the junior subordinated notes in December 2034, or upon earlier redemption as provided in the junior subordinated notes. Since December 2009, the junior subordinated notes purchased by SH Trust I have been available to be redeemed, in whole or in part. As specified in the indenture, if the junior subordinated notes are redeemed prior to maturity, the redemption price will be the principal amount, plus any unpaid accrued interest. In accordance with U.S. GAAP, SH Trust I is not consolidated with Park’s financial statements, but rather the subordinated notes are reflected as a liability. Repaid Subordinated Notes As part of the acquisition of Vision’s parent bank holding company (“Vision Parent”) on March 9, 2007, Park acquired a wholly-owned statutory business trust of Vision Parent (“Trust I”). On December 5, 2005, Trust I issued $15.0 million floating rate preferred securities to institutional investors which it used to purchase $15.5 million of junior subordinated notes from Vision. Both the junior subordinated notes and the trust preferred securities, following the cessation of LIBOR, carried a floating rate based on three-month CME Term SOFR plus 174 basis points. Since December 30, 2010, Park has had the right to redeem these securities. On September 30, 2025, Park redeemed in full, $15.0 million in trust preferred securities at a redemption price in cash equal to 100% of the principal amount, plus accrued and unpaid interest. On August 20, 2020, Park completed the issuance and sale of $175.0 million aggregate principal amount of its 4.50% Fixed-to-Floating Rate Subordinated Notes due 2030 (the "Subordinated Notes"). Beginning on September 1, 2025, Park had the right to redeem the Subordinated Notes, in whole or in part. On September 1, 2025, Park redeemed in full, $175.0 million outstanding of the Subordinated Notes at a redemption price in cash equal to 100% of the principal amount of the Subordinated Notes, plus accrued and unpaid interest. All of the repayments described in this Note 15 were made using available cash on hand and did not involve any refinancing or issuance of new debt.

In March 2005, First Citizens formed First Citizens (TN) Statutory Trust III ("FC Trust III"), a Delaware statutory trust, which issued $5.0 million of FC Trust III's floating rate preferred securities (the “FC III Trust Preferred Securities”) to institutional investors. These FC III Trust Preferred Securities qualify as Tier I capital under FRB guidelines. All of the common securities of FC Trust III are owned by Park. The proceeds from the issuance of the common securities and the FC III Trust Preferred Securities were used by FC Trust III to purchase $5.2 million of junior subordinated notes, which, following the cessation of LIBOR on June 30, 2023, carry a floating rate based on three-month CME Term SOFR plus 206 basis points. The junior subordinated notes represent the sole asset of FC Trust III. The FC Trust III Preferred Securities accrue and pay distributions at a floating rate of three-month CME Term SOFR plus 206 basis points per annum. The FC Trust III Trust Preferred Securities are mandatorily redeemable upon maturity of the junior subordinated notes in March 2035, or upon earlier redemption as provided in the junior subordinated notes. Since March 2010, the junior subordinated notes purchased by FC Trust III have been available to be redeemed, in whole or in part. As specified in the indenture, if the junior subordinated notes are redeemed prior to maturity, the redemption price will be the principal amount, plus any unpaid accrued interest. In accordance with U.S. GAAP, FC Trust III is not consolidated with Park’s financial statements, but rather the subordinated notes are reflected as a liability.

In March 2007, First Citizens formed First Citizens (TN) Statutory Trust IV ("FC Trust IV"), a Delaware statutory trust, which issued $5.0 million of FC Trust IV's floating rate preferred securities (the “FC IV Trust Preferred Securities”) to institutional investors. These FC IV Trust Preferred Securities qualify as Tier I capital under FRB guidelines. All of the common securities of FC Trust IV are owned by Park. The proceeds from the issuance of the common securities and the FC IV Trust Preferred Securities were used by FC Trust IV to purchase $5.2 million of junior subordinated notes, which, following the cessation of LIBOR on June 30, 2023, carry a floating rate based on three-month CME Term SOFR plus 201 basis points. The junior subordinated notes represent the sole asset of FC Trust IV. The FC Trust IV Preferred Securities accrue and pay distributions at a floating rate of three-month CME Term SOFR plus 201 basis points per annum. The FC Trust IV Trust Preferred Securities are mandatorily redeemable upon maturity of the junior subordinated notes in June 2037, or upon earlier redemption as provided in the junior subordinated notes. Since March 2012, the junior subordinated notes purchased by FC Trust IV have been available to be redeemed, in whole or in part. As specified in the indenture, if the junior subordinated notes are redeemed prior to maturity, the redemption price will be the principal amount, plus any unpaid accrued interest. In accordance with U.S. GAAP, FC Trust IV is not consolidated with Park’s financial statements, but rather the subordinated notes are reflected as a liability.

Pursuant to First Citizens merger with Southern Heritage Bancshares on October 1, 2014, First Citizens assumed the debentures issued to Southern Heritage Statutory Trust I ("SH Trust I"). In December 2004, Southern Heritage Bancshares formed SH Trust I, a Delaware statutory trust, which issued $5.0 million of SH Trust I's floating rate preferred securities (the “SH I Trust Preferred Securities”) to institutional investors. These SH I Trust Preferred Securities qualify as Tier I capital under FRB guidelines. All of the common securities of SH Trust I are owned by Park. The proceeds from the issuance of the common securities and the SH I Trust Preferred Securities were used by SH Trust I to purchase $5.2 million of junior subordinated notes, which, following the cessation of LIBOR on June 30, 2023, carry a floating rate based on three-month CME Term SOFR plus 231 basis points. The junior subordinated notes represent the sole asset of SH Trust I. The SH I Preferred Securities accrue and pay distributions at a floating rate of three-month CME Term SOFR plus 231 basis points per annum. The SH Trust I Trust Preferred Securities are mandatorily redeemable upon maturity of the junior subordinated notes in December 2034, or upon earlier redemption as provided in the junior subordinated notes. Since December 2009, the junior subordinated notes purchased by SH Trust I have been available to be redeemed, in whole or in part. As specified in the indenture, if the junior subordinated notes are redeemed prior to maturity, the redemption price will be the principal amount, plus any unpaid accrued interest. In accordance with U.S. GAAP, SH Trust I is not consolidated with Park’s financial statements, but rather the subordinated notes are reflected as a liability.

As part of the acquisition of Vision’s parent bank holding company (“Vision Parent”) on March 9, 2007, Park acquired a wholly-owned statutory business trust of Vision Parent (“Trust I”). On December 5, 2005, Trust I issued $15.0 million floating rate preferred securities to institutional investors which it used to purchase $15.5 million of junior subordinated notes from Vision. Both the junior subordinated notes and the trust preferred securities, following the cessation of LIBOR, carried a floating rate based on three-month CME Term SOFR plus 174 basis points. Since December 30, 2010, Park has had the right to redeem these securities. On September 30, 2025, Park redeemed in full, $15.0 million in trust preferred securities at a redemption price in cash equal to 100% of the principal amount, plus accrued and unpaid interest.

On August 20, 2020, Park completed the issuance and sale of $175.0 million aggregate principal amount of its 4.50% Fixed-to-Floating Rate Subordinated Notes due 2030 (the "Subordinated Notes"). Beginning on September 1, 2025, Park had the right to redeem the Subordinated Notes, in whole or in part. On September 1, 2025, Park redeemed in full, $175.0 million outstanding of the Subordinated Notes at a redemption price in cash equal to 100% of the principal amount of the Subordinated Notes, plus accrued and unpaid interest.