Fair Value - Assets and Liabilities Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets
Total available-for-sale securities, Fair value,	$ 2,159,338	$ 2,255,336
Collateralized Loan Obligations
Assets
Total available-for-sale securities, Fair value,	239,676	247,854
Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	2,159,338	2,255,336
Other assets	13,237	13,285
Liabilities
Other liabilities	(7,046)	(4,620)
Total
Net Assets (Liabilities)	2,165,529	2,264,001
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Other assets	216	517
Total
Net Assets (Liabilities)	216	517
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	2,159,338	2,255,336
Other assets	13,021	12,768
Liabilities
Other liabilities	(4,746)	(2,320)
Total
Net Assets (Liabilities)	2,167,613	2,265,784
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Liabilities
Other liabilities	(2,300)	(2,300)
Total
Net Assets (Liabilities)	(2,300)	(2,300)
U.S. Treasury and government agency debt securities
Assets
Total available-for-sale securities, Fair value,	12,821	32,503
U.S. Treasury and government agency debt securities | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	12,821	32,503
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,	12,821	32,503
Government-sponsored enterprises debt securities
Assets
Total available-for-sale securities, Fair value,	19,629	19,592
Government-sponsored enterprises debt securities | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	19,629	19,592
Government-sponsored enterprises debt securities | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	19,629	19,592
Residential - Government agency
Assets
Total available-for-sale securities, Fair value,	9,609	10,182
Residential - Government agency | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	9,609	10,182
Residential - Government agency | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	9,609	10,182
Residential - Government-sponsored enterprises
Assets
Total available-for-sale securities, Fair value,	753,385	783,297
Residential - Government-sponsored enterprises | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	753,385	783,297
Residential - Government-sponsored enterprises | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	753,385	783,297
Commercial - Government agency
Assets
Total available-for-sale securities, Fair value,	213,394	218,674
Commercial - Government agency | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	213,394	218,674
Commercial - Government agency | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	213,394	218,674
Commercial - Government-sponsored enterprises
Assets
Total available-for-sale securities, Fair value,	83,490	86,431
Commercial - Government-sponsored enterprises | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	83,490	86,431
Commercial - Government-sponsored enterprises | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	83,490	86,431
Commercial - Non-government mortgage | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	22,110	21,683
Commercial - Non-government mortgage | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	22,110	21,683
Government agency
Assets
Total available-for-sale securities, Fair value,	452,163	471,150
Government agency | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	452,163	471,150
Government agency | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	452,163	471,150
Government-sponsored enterprises
Assets
Total available-for-sale securities, Fair value,	353,061	363,970
Government-sponsored enterprises | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	353,061	363,970
Government-sponsored enterprises | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	353,061	363,970
Collateralized Loan Obligations | Fair Value, Measurements, Recurring
Assets
Total available-for-sale securities, Fair value,	239,676	247,854
Collateralized Loan Obligations | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	$ 239,676	$ 247,854