v3.26.1
Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2026
Fair Value Disclosures [Abstract]  
Schedule of Financial Assets and Financial Liabilities Measured at Fair Value on a Recurring Basis
Financial assets and financial liabilities measured at fair value on a recurring basis are as follows:
Fair Value Measurements at Reporting Date Using
As of June 30, 2026Fair ValueQuoted Prices in
Active Markets for
Identical Assets
(Level 1)		Significant Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Investment debt securities available-for-sale:
U.S. Treasury notes$237.5 $—$237.5 $—
State, county, and municipal securities216.9 —216.9 —
Obligations of U.S. government agencies171.8 —171.8 —
U.S. agency commercial mortgage-backed securities822.7 —822.7 —
U.S. agency residential mortgage-backed securities2,402.9 —2,402.9 —
U.S. agency collateralized mortgage obligations837.2 —837.2 —
Private mortgage-backed securities161.1 —161.1 —
Collateralized loan obligations809.5 —809.5 —
Corporate securities110.2 —110.2 —
Loans held for sale2.1 —2.1 —
Derivative assets:
Interest rate swap contracts29.6 —29.6 —
Interest rate lock commitments0.1 —0.1 —
Derivative liabilities:
Interest rate swap contracts81.2 —81.2 —
Deferred compensation plan assets21.8 21.8— —
Fair Value Measurements at Reporting Date Using
As of December 31, 2025Fair ValueQuoted Prices in
Active Markets for
Identical Assets
(Level 1)		Significant Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Investment debt securities available-for-sale:
U.S. Treasury notes$237.7 $—$237.7 $—
State, county and municipal securities220.1 —220.1 —
Obligations of U.S. government agencies200.9 —200.9 —
U.S. agency commercial mortgage-backed securities856.7 —856.7 —
U.S. agency residential mortgage-backed securities1,770.1 —1,770.1 —
U.S. agency collateralized mortgage obligations922.7 —922.7 —
Private mortgage-backed securities174.4 —174.4 —
Collateralized loan obligations755.5 —755.5 —
Corporate securities150.0 —150.0 —
Loans held for sale1.1 —1.1 —
Derivative assets:
Interest rate swap contracts26.6 —26.6 —
Derivative liabilities
Interest rate swap contracts77.3 —77.3 —
Deferred compensation plan assets23.2 23.2— —
Schedule of Financial Assets and Financial Liabilities Measured at Fair Value on a Non-Recurring Basis The following table presents information about the Company’s assets and liabilities measured at fair value on a non-recurring basis with an adjustment during the period presented. The fair values may not be current as of the reporting date but represent fair values as of the most recent fair value change that occurred within the reporting period. Accordingly, carrying values may not equal the current fair value:
As of June 30, 2026Fair ValueQuoted Prices in Active Markets for Identical Assets (Level 1)Significant Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Collateral-dependent loans$53.4 $—$—$53.4 
Long-lived assets to be disposed of by sale0.6 ——0.6 
As of December 31, 2025
Collateral-dependent loans$21.5 $—$—$21.5 
Long-lived assets to be disposed of by sale1.3 ——1.3 
Fair Value Inputs, Assets, Quantitative Information
The following table presents additional quantitative information about assets measured at fair value on a non-recurring basis and for which the Company has utilized Level 3 inputs to determine fair values:
As of June 30, 2026
Fair ValueValuation
Technique		Unobservable InputsRange
(Weighted-Average)
Collateral-dependent loans$53.4 AppraisalAppraisal adjustment5%-89%(31%)
Long-lived assets to be disposed of by sale0.6 AppraisalAppraisal adjustment—-——
As of December 31, 2025
Collateral-dependent loans$21.5 AppraisalAppraisal adjustment2%-99%(33%)
Long-lived assets to be disposed of by sale1.3 AppraisalAppraisal adjustment— -— — 
Fair Value, by Balance Sheet Grouping
The estimated fair values of financial instruments that are reported in the Company’s consolidated balance sheets, and are segregated by the level of the valuation inputs within the fair value hierarchy that are utilized to measure fair value, are as follows:
Fair Value Measurements at Reporting Date Using
As of June 30, 2026Carrying AmountEstimated
Fair Value		Quoted Prices in Active Markets for
Identical Assets
(Level 1)		Significant Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Financial assets:
Cash and cash equivalents$1,167.1 $1,167.1 $1,167.1 $— $— 
Investment debt securities held-to-maturity2,215.8 2,000.3 — 2,000.3 — 
Accrued interest receivable97.3 97.3 — 97.3 — 
Mortgage servicing rights, net22.0 32.0 — — 32.0 
Net loans held for investment14,099.2 13,820.5 — — 13,820.5 
Total financial assets$17,601.4 $17,117.2 $1,167.1 $2,097.6 $13,852.5 
Financial liabilities:
Total deposits, excluding time deposits$19,241.1 $19,241.1 $19,241.1 $— $— 
Time deposits2,200.2 2,185.0 — 2,185.0 — 
Securities sold under repurchase agreements455.2 455.2 — 455.2 — 
Accrued interest payable27.7 27.7 — 27.7 — 
Long-term debt146.8 153.2 — 153.2 — 
Subordinated debentures held by subsidiary trusts149.9 140.5 — 140.5 — 
Total financial liabilities$22,220.9 $22,202.7 $19,241.1 $2,961.6 $— 
Fair Value Measurements at Reporting Date Using
As of December 31, 2025Carrying AmountEstimated
Fair Value		Quoted Prices in Active Markets for
Identical Assets
(Level 1)		Significant Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Financial assets:
Cash and cash equivalents$1,309.7 $1,309.7 $1,309.7 $— $— 
Investment debt securities held-to-maturity2,342.1 2,136.6 — 2,136.6 — 
Accrued interest receivable102.6 102.6 — 102.6 — 
Mortgage servicing rights, net23.1 32.3 — — 32.3 
Net loans held for investment15,010.2 14,769.1 — — 14,769.1 
Total financial assets$18,787.7 $18,350.3 $1,309.7 $2,239.2 $14,801.4 
Financial liabilities:
Total deposits, excluding time deposits$19,450.0 $19,450.0 $19,450.0 $— $— 
Time deposits2,638.3 2,629.2 — 2,629.2 — 
Securities sold under repurchase agreements479.6 479.6 — 479.6 — 
Accrued interest payable36.9 36.9 — 36.9 — 
Long-term debt146.3 153.4 — 153.4 — 
Subordinated debentures held by subsidiary trusts149.8 140.0 — 140.0 — 
Total financial liabilities$22,900.9 $22,889.1 $19,450.0 $3,439.1 $—