Investment Securities - Gross Unrealized Losses for Available-for-Sale Securities (Details) - USD ($) $ in Thousands		Mar. 31, 2026	Dec. 31, 2025
Available-for-Sale Securities
Less than 12 months, fair value		$ 447,561	$ 74,658
Less than 12 months, unrealized losses		2,612	476
12 months or more, fair value		73,644	81,834
12 months or more, unrealized losses		17,648	17,616
Fair value		521,205	156,492
Unrealized losses		20,260	18,092
U.S. Government-sponsored Securities [Member]
Available-for-Sale Securities
Less than 12 months, fair value		359	461
Less than 12 months, unrealized losses		1	2
12 months or more, fair value		563	676
12 months or more, unrealized losses		7	8
Fair value		922	1,137
Unrealized losses		8	10
Mortgage-backed Securities [Member]
Available-for-Sale Securities
Less than 12 months, fair value	[1]	418,622	60,935
Less than 12 months, unrealized losses	[1]	2,277	244
12 months or more, fair value	[1]	67,673	75,647
12 months or more, unrealized losses	[1]	17,417	17,476
Fair value	[1]	486,295	136,582
Unrealized losses	[1]	19,694	17,720
Collateralized Mortgage Obligations [Member]
Available-for-Sale Securities
Less than 12 months, fair value	[1]	14,911	13,262
Less than 12 months, unrealized losses	[1]	269	230
12 months or more, fair value	[1]	5,408	5,511
12 months or more, unrealized losses	[1]	224	132
Fair value	[1]	20,319	18,773
Unrealized losses	[1]	493	$ 362
Municipal Securities [Member]
Available-for-Sale Securities
Less than 12 months, fair value		3,980
Less than 12 months, unrealized losses		19
12 months or more, fair value		0
12 months or more, unrealized losses		0
Fair value		3,980
Unrealized losses		19
Corporate Securities [Member]
Available-for-Sale Securities
Less than 12 months, fair value		9,689
Less than 12 months, unrealized losses		46
12 months or more, fair value		0
12 months or more, unrealized losses		0
Fair value		9,689
Unrealized losses		$ 46

[1] All mortgage-backed securities and collateralized mortgage obligations were issued by an agency or government sponsored entity of the U.S. Government.