Fair Value of Financial Instruments - Schedule of Balances and Levels of Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Financial assets:
AFS debt securities:	$ 1,426,951	$ 1,538,008
Equity securities, at fair value	1,450	0
Mortgage-backed securities - residential
Financial assets:
AFS debt securities:	587,587	810,999
Mortgage-backed securities - commercial
Financial assets:
AFS debt securities:	10,681	14,857
Municipal securities
Financial assets:
AFS debt securities:	165,411	147,857
U.S. Treasury securities
Financial assets:
AFS debt securities:	7,080	299
Corporate securities
Financial assets:
AFS debt securities:	2,995	989
Recurring Basis
Financial assets:
Equity securities, at fair value	1,450
Total securities	1,428,401	1,538,008
Loans held for sale, at fair value	145,789	95,403
Mortgage servicing rights	149,840	162,038
Derivatives	28,560	29,951
Financial liabilities:
Derivatives	28,414	32,383
Recurring Basis | U.S. government agency securities
Financial assets:
AFS debt securities:	653,197	563,007
Recurring Basis | Mortgage-backed securities - residential
Financial assets:
AFS debt securities:	587,587	810,999
Recurring Basis | Mortgage-backed securities - commercial
Financial assets:
AFS debt securities:	10,681	14,857
Recurring Basis | Municipal securities
Financial assets:
AFS debt securities:	165,411	147,857
Recurring Basis | U.S. Treasury securities
Financial assets:
AFS debt securities:	7,080	299
Recurring Basis | Corporate securities
Financial assets:
AFS debt securities:	2,995	989
Recurring Basis | Quoted prices in active markets for identical assets (liabilities) (level 1)
Financial assets:
Equity securities, at fair value	0
Total securities	0	0
Loans held for sale, at fair value	0	0
Mortgage servicing rights	0	0
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring Basis | Quoted prices in active markets for identical assets (liabilities) (level 1) | U.S. government agency securities
Financial assets:
AFS debt securities:	0	0
Recurring Basis | Quoted prices in active markets for identical assets (liabilities) (level 1) | Mortgage-backed securities - residential
Financial assets:
AFS debt securities:	0	0
Recurring Basis | Quoted prices in active markets for identical assets (liabilities) (level 1) | Mortgage-backed securities - commercial
Financial assets:
AFS debt securities:	0	0
Recurring Basis | Quoted prices in active markets for identical assets (liabilities) (level 1) | Municipal securities
Financial assets:
AFS debt securities:	0	0
Recurring Basis | Quoted prices in active markets for identical assets (liabilities) (level 1) | U.S. Treasury securities
Financial assets:
AFS debt securities:	0	0
Recurring Basis | Quoted prices in active markets for identical assets (liabilities) (level 1) | Corporate securities
Financial assets:
AFS debt securities:	0	0
Recurring Basis | Significant other observable inputs (level 2)
Financial assets:
Equity securities, at fair value	1,450
Total securities	1,428,401	1,538,008
Loans held for sale, at fair value	145,789	95,403
Mortgage servicing rights	0	0
Derivatives	28,560	29,951
Financial liabilities:
Derivatives	28,414	32,383
Recurring Basis | Significant other observable inputs (level 2) | U.S. government agency securities
Financial assets:
AFS debt securities:	653,197	563,007
Recurring Basis | Significant other observable inputs (level 2) | Mortgage-backed securities - residential
Financial assets:
AFS debt securities:	587,587	810,999
Recurring Basis | Significant other observable inputs (level 2) | Mortgage-backed securities - commercial
Financial assets:
AFS debt securities:	10,681	14,857
Recurring Basis | Significant other observable inputs (level 2) | Municipal securities
Financial assets:
AFS debt securities:	165,411	147,857
Recurring Basis | Significant other observable inputs (level 2) | U.S. Treasury securities
Financial assets:
AFS debt securities:	7,080	299
Recurring Basis | Significant other observable inputs (level 2) | Corporate securities
Financial assets:
AFS debt securities:	2,995	989
Recurring Basis | Significant unobservable inputs (level 3)
Financial assets:
Equity securities, at fair value	0
Total securities	0	0
Loans held for sale, at fair value	0	0
Mortgage servicing rights	149,840	162,038
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring Basis | Significant unobservable inputs (level 3) | U.S. government agency securities
Financial assets:
AFS debt securities:	0	0
Recurring Basis | Significant unobservable inputs (level 3) | Mortgage-backed securities - residential
Financial assets:
AFS debt securities:	0	0
Recurring Basis | Significant unobservable inputs (level 3) | Mortgage-backed securities - commercial
Financial assets:
AFS debt securities:	0	0
Recurring Basis | Significant unobservable inputs (level 3) | Municipal securities
Financial assets:
AFS debt securities:	0	0
Recurring Basis | Significant unobservable inputs (level 3) | U.S. Treasury securities
Financial assets:
AFS debt securities:	0	0
Recurring Basis | Significant unobservable inputs (level 3) | Corporate securities
Financial assets:
AFS debt securities:	$ 0	$ 0