Fair Value - Assets and Liabilities Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets
Total available-for-sale securities, Fair value,	$ 3,151,133	$ 8,428,032
Collateralized Loan Obligations
Assets
Total available-for-sale securities, Fair value,	241,321	105,247
Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	3,151,133	8,428,032
Other assets	16,321	58,307
Liabilities
Other liabilities	(50,119)	(6,768)
Total
Net Assets (Liabilities)	3,117,335	8,479,571
Fair Value, Measurements, Recurring | Collateralized Loan Obligations
Assets
Total available-for-sale securities, Fair value,	241,321
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Other assets	5,376	7,382
Total
Net Assets (Liabilities)	5,376	7,382
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	3,151,133	8,428,032
Other assets	10,945	50,925
Liabilities
Other liabilities	(49,268)	(1,238)
Total
Net Assets (Liabilities)	3,112,810	8,477,719
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Collateralized Loan Obligations
Assets
Total available-for-sale securities, Fair value,	241,321
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Liabilities
Other liabilities	(851)	(5,530)
Total
Net Assets (Liabilities)	(851)	(5,530)
U.S. Treasury and government agency debt securities
Assets
Total available-for-sale securities, Fair value,	150,982	192,563
U.S. Treasury and government agency debt securities | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	150,982	192,563
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,	150,982	192,563
Government-sponsored enterprises debt securities
Assets
Total available-for-sale securities, Fair value,	44,301
Government-sponsored enterprises debt securities | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	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,	44,301
Residential - Government agency
Assets
Total available-for-sale securities, Fair value,	59,723	137,264
Residential - Government agency | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	59,723	137,264
Residential - Government agency | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	59,723	137,264
Residential - Government-sponsored enterprises
Assets
Total available-for-sale securities, Fair value,	1,160,455	1,491,100
Residential - Government-sponsored enterprises | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	1,160,455	1,491,100
Residential - Government-sponsored enterprises | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	1,160,455	1,491,100
Commercial - Government agency
Assets
Total available-for-sale securities, Fair value,	237,853	387,663
Commercial - Government agency | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	237,853	387,663
Commercial - Government agency | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	237,853	387,663
Commercial - Government-sponsored enterprises
Assets
Total available-for-sale securities, Fair value,	119,573	1,369,443
Commercial - Government-sponsored enterprises | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	119,573	1,369,443
Commercial - Government-sponsored enterprises | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	119,573	1,369,443
Commercial - Non-government mortgage | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	21,471
Commercial - Non-government mortgage | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	21,471
Government agency
Assets
Total available-for-sale securities, Fair value,	653,322	2,079,523
Government agency | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	653,322	2,079,523
Government agency | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	653,322	2,079,523
Government-sponsored enterprises
Assets
Total available-for-sale securities, Fair value,	462,132	2,621,044
Government-sponsored enterprises | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	462,132	2,621,044
Government-sponsored enterprises | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	$ 462,132	2,621,044
Collateralized Loan Obligations | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,		105,247
Collateralized Loan Obligations | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,		105,247
Debt securities issued by states and political subdivisions
Assets
Total available-for-sale securities, Fair value,		44,185
Debt securities issued by states and political subdivisions | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,		44,185
Debt securities issued by states and political subdivisions | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,		$ 44,185