Fair Value - Assets and Liabilities Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Assets
Total available-for-sale securities, Fair value,	$ 2,909,372	$ 3,151,133
Collateralized Loan Obligations
Assets
Total available-for-sale securities, Fair value,	240,614	241,321
Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	2,909,372	3,151,133
Other assets	30,956	16,321
Liabilities
Other liabilities	(28,020)	(50,119)
Total
Net Assets (Liabilities)	2,912,308	3,117,335
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Other assets	2,257	5,376
Total
Net Assets (Liabilities)	2,257	5,376
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	2,909,372	3,151,133
Other assets	28,699	10,945
Liabilities
Other liabilities	(26,820)	(49,268)
Total
Net Assets (Liabilities)	2,911,251	3,112,810
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Liabilities
Other liabilities	(1,200)	(851)
Total
Net Assets (Liabilities)	(1,200)	(851)
U.S. Treasury and government agency debt securities
Assets
Total available-for-sale securities, Fair value,	116,885	150,982
U.S. Treasury and government agency debt securities | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	116,885	150,982
U.S. Treasury and government agency debt securities | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	116,885	150,982
Government-sponsored enterprises debt securities
Assets
Total available-for-sale securities, Fair value,	44,240	44,301
Government-sponsored enterprises debt securities | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	44,240	44,301
Government-sponsored enterprises debt securities | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	44,240	44,301
Residential - Government agency
Assets
Total available-for-sale securities, Fair value,	57,202	59,723
Residential - Government agency | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	57,202	59,723
Residential - Government agency | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	57,202	59,723
Residential - Government-sponsored enterprises
Assets
Total available-for-sale securities, Fair value,	1,082,992	1,160,455
Residential - Government-sponsored enterprises | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	1,082,992	1,160,455
Residential - Government-sponsored enterprises | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	1,082,992	1,160,455
Commercial - Government agency
Assets
Total available-for-sale securities, Fair value,	225,462	237,853
Commercial - Government agency | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	225,462	237,853
Commercial - Government agency | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	225,462	237,853
Commercial - Government-sponsored enterprises
Assets
Total available-for-sale securities, Fair value,	87,897	119,573
Commercial - Government-sponsored enterprises | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	87,897	119,573
Commercial - Government-sponsored enterprises | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	87,897	119,573
Commercial - Non-government mortgage | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	21,379	21,471
Commercial - Non-government mortgage | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	21,379	21,471
Government agency
Assets
Total available-for-sale securities, Fair value,	605,221	653,322
Government agency | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	605,221	653,322
Government agency | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	605,221	653,322
Government-sponsored enterprises
Assets
Total available-for-sale securities, Fair value,	427,480	462,132
Government-sponsored enterprises | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	427,480	462,132
Government-sponsored enterprises | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	427,480	462,132
Collateralized Loan Obligations | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	240,614	241,321
Collateralized Loan Obligations | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	$ 240,614	$ 241,321