Fair Value - Assets and Liabilities Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Assets
Total available-for-sale securities, Fair value,	$ 2,055,959	$ 2,255,336
Collateralized Loan Obligations [Member]
Assets
Total available-for-sale securities, Fair value,	208,944	247,854
Fair Value, Recurring [Member]
Assets
Total available-for-sale securities, Fair value,	2,055,959	2,255,336
Other assets	16,229	13,285
Liabilities
Other liabilities	(11,149)	(4,620)
Total
Net Assets (Liabilities)	2,061,039	2,264,001
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Other assets	109	517
Total
Net Assets (Liabilities)	109	517
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	2,055,959	2,255,336
Other assets	16,120	12,768
Liabilities
Other liabilities	(8,849)	(2,320)
Total
Net Assets (Liabilities)	2,063,230	2,265,784
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3)
Liabilities
Other liabilities	(2,300)	(2,300)
Total
Net Assets (Liabilities)	(2,300)	(2,300)
US Treasury and Government [Member]
Assets
Total available-for-sale securities, Fair value,	13,197	32,503
US Treasury and Government [Member] | Fair Value, Recurring [Member]
Assets
Total available-for-sale securities, Fair value,	13,197	32,503
US Treasury and Government [Member] | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	13,197	32,503
US Government-sponsored Enterprises Debt Securities [Member]
Assets
Total available-for-sale securities, Fair value,	19,847	19,592
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member]
Assets
Total available-for-sale securities, Fair value,	19,847	19,592
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	19,847	19,592
Residential - Government agency
Assets
Total available-for-sale securities, Fair value,	9,367	10,182
Residential - Government agency | Fair Value, Recurring [Member]
Assets
Total available-for-sale securities, Fair value,	9,367	10,182
Residential - Government agency | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	9,367	10,182
Residential - Government-sponsored enterprises
Assets
Total available-for-sale securities, Fair value,	723,591	783,297
Residential - Government-sponsored enterprises | Fair Value, Recurring [Member]
Assets
Total available-for-sale securities, Fair value,	723,591	783,297
Residential - Government-sponsored enterprises | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	723,591	783,297
Commercial - Government agency
Assets
Total available-for-sale securities, Fair value,	216,010	218,674
Commercial - Government agency | Fair Value, Recurring [Member]
Assets
Total available-for-sale securities, Fair value,	216,010	218,674
Commercial - Government agency | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	216,010	218,674
Commercial - Government-sponsored enterprises
Assets
Total available-for-sale securities, Fair value,	69,067	86,431
Commercial - Government-sponsored enterprises | Fair Value, Recurring [Member]
Assets
Total available-for-sale securities, Fair value,	69,067	86,431
Commercial - Government-sponsored enterprises | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	69,067	86,431
Commercial - Non-government mortgage | Fair Value, Recurring [Member]
Assets
Total available-for-sale securities, Fair value,	22,069	21,683
Commercial - Non-government mortgage | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	22,069	21,683
Government agency
Assets
Total available-for-sale securities, Fair value,	434,141	471,150
Government agency | Fair Value, Recurring [Member]
Assets
Total available-for-sale securities, Fair value,	434,141	471,150
Government agency | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	434,141	471,150
Government-sponsored enterprises
Assets
Total available-for-sale securities, Fair value,	339,726	363,970
Government-sponsored enterprises | Fair Value, Recurring [Member]
Assets
Total available-for-sale securities, Fair value,	339,726	363,970
Government-sponsored enterprises | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	339,726	363,970
Collateralized Loan Obligations [Member] | Fair Value, Recurring [Member]
Assets
Total available-for-sale securities, Fair value,	208,944	247,854
Collateralized Loan Obligations [Member] | Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2)
Assets
Total available-for-sale securities, Fair value,	$ 208,944	$ 247,854