Fair Value of Financial Instruments - Schedule of Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Financial assets
Cash and due from banks	$ 816,135	$ 864,904
Certificates of deposit with other banks	250	250
Carrying Amount
Financial assets
Cash and due from banks	816,135	864,904
Certificates of deposit with other banks	250	250
Loans held for sale	435,313	420,055
Loans and leases held for investment, net of allowance for credit losses on loans and leases	11,719,997	11,520,733
Financial liabilities
Deposits	13,835,058	13,688,659
Borrowings	99,746	102,404
Estimate of Fair Value Measurement
Financial assets
Cash and due from banks	816,135	864,904
Certificates of deposit with other banks	250	250
Loans held for sale	460,878	440,928
Loans and leases held for investment, net of allowance for credit losses on loans and leases	11,548,151	11,329,479
Financial liabilities
Deposits	13,181,865	13,096,941
Borrowings	107,267	110,782
Estimate of Fair Value Measurement \| Level 1
Financial assets
Cash and due from banks	816,135	864,904
Certificates of deposit with other banks	250	250
Loans held for sale	0	0
Loans and leases held for investment, net of allowance for credit losses on loans and leases	0	0
Financial liabilities
Deposits	0	0
Borrowings	0	0
Estimate of Fair Value Measurement \| Level 2
Financial assets
Cash and due from banks	0	0
Certificates of deposit with other banks	0	0
Loans held for sale	0	0
Loans and leases held for investment, net of allowance for credit losses on loans and leases	0	0
Financial liabilities
Deposits	13,181,865	13,096,941
Borrowings	0	0
Estimate of Fair Value Measurement \| Level 3
Financial assets
Cash and due from banks	0	0
Certificates of deposit with other banks	0	0
Loans held for sale	460,878	440,928
Loans and leases held for investment, net of allowance for credit losses on loans and leases	11,548,151	11,329,479
Financial liabilities
Deposits	0	0
Borrowings	$ 107,267	$ 110,782

For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks.

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A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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