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Disclosures about Fair Value of Assets and Liabilities - Carrying Value and Estimated Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financial assets:
Securities held to maturity	$ 1,203,535	$ 1,118,966
Loans held for sale	86,663	82,192
Carrying value per balance sheet
Financial assets:
Cash and cash equivalents	584,422	226,164
Securities purchased under agreements to resell	3,349
Securities purchased under agreements to resell		3,464
Securities held to maturity	1,204,217	1,119,078
FHLB stock	48,578	39,130
Loans held for sale	3,058,093	2,828,384
Loans receivable, net	10,127,801	7,426,858
Interest receivable	91,346	56,262
Financial liabilities:
Deposits	14,061,460	10,071,345
Short-term subordinated debt	64,922	21,000
FHLB advances	771,392	859,392
Other borrowing	7,934	50,000
Credit linked notes	119,879
Interest payable	43,423	23,384
Estimated fair value
Financial assets:
Cash and cash equivalents	584,422	226,164
Securities purchased under agreements to resell	3,349
Securities purchased under agreements to resell		3,464
Securities held to maturity	1,203,535	1,118,966
FHLB stock	48,578	39,130
Loans held for sale	3,058,093	2,828,384
Loans receivable, net	10,088,468	7,431,731
Interest receivable	91,346	56,262
Financial liabilities:
Deposits	14,062,457	10,064,941
Short-term subordinated debt	64,922	21,000
FHLB advances	771,029	858,984
Other borrowing	7,934	50,000
Credit linked notes	119,878
Interest payable	43,423	23,384
Level 1 | Estimated fair value
Financial assets:
Cash and cash equivalents	584,422	226,164
Financial liabilities:
Deposits	8,894,058	7,082,056
Level 2 | Estimated fair value
Financial assets:
Securities purchased under agreements to resell	3,349
Securities purchased under agreements to resell		3,464
Securities held to maturity	484,288	247,182
FHLB stock	48,578	39,130
Loans held for sale	3,058,093	2,828,384
Interest receivable	91,346	56,262
Financial liabilities:
Deposits	5,168,399	2,982,885
Short-term subordinated debt	64,922	21,000
FHLB advances	771,029	858,984
Other borrowing	7,934	50,000
Credit linked notes	119,878
Interest payable	43,423	23,384
Level 3 | Estimated fair value
Financial assets:
Securities held to maturity	719,247	871,784
Loans receivable, net	$ 10,088,468	$ 7,431,731

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