Securities - Company's Securities Gross Unrealized Losses and Fair Values, Aggregated by Length of Time Individual Securities Have Been in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Available-for-Sale Securities:
Securities With Gross Unrealized Losses 12 Months or More, Fair Value	$ 116,044	$ 119,798
Securities With Gross Unrealized Losses 12 Months or More, Unrealized Losses	(21,075)	(19,879)
Securities With Gross Unrealized Losses, Total Fair Value	116,044	119,798
Securities With Gross Unrealized Losses, Total Unrealized Losses	(21,075)	(19,879)
Held-to-Maturity Securities:
Securities With Gross Unrealized Losses Less Than 12 Months, Fair Value	36,748	85,163
Securities With Gross Unrealized Losses Less Than 12 Months, Unrealized Losses	(619)	(937)
Securities With Gross Unrealized Losses 12 Months or More, Fair Value	382,251	332,188
Securities With Gross Unrealized Losses 12 Months or More, Unrealized Losses	(14,865)	(11,437)
Securities With Gross Unrealized Losses, Total Fair Value	418,999	417,351
Securities With Gross Unrealized Losses, Total Unrealized Losses	(15,484)	(12,374)
U.S. Government Bonds
Available-for-Sale Securities:
Securities With Gross Unrealized Losses 12 Months or More, Fair Value	2,780	2,784
Securities With Gross Unrealized Losses 12 Months or More, Unrealized Losses	(211)	(206)
Securities With Gross Unrealized Losses, Total Fair Value	2,780	2,784
Securities With Gross Unrealized Losses, Total Unrealized Losses	(211)	(206)
US Agency Bonds
Held-to-Maturity Securities:
Securities With Gross Unrealized Losses 12 Months or More, Fair Value	24,711	24,819
Securities With Gross Unrealized Losses 12 Months or More, Unrealized Losses	(289)	(181)
Securities With Gross Unrealized Losses, Total Fair Value	24,711	24,819
Securities With Gross Unrealized Losses, Total Unrealized Losses	(289)	(181)
Corporate Bonds
Available-for-Sale Securities:
Securities With Gross Unrealized Losses 12 Months or More, Fair Value	23,520	23,668
Securities With Gross Unrealized Losses 12 Months or More, Unrealized Losses	(2,262)	(2,122)
Securities With Gross Unrealized Losses, Total Fair Value	23,520	23,668
Securities With Gross Unrealized Losses, Total Unrealized Losses	(2,262)	(2,122)
Held-to-Maturity Securities:
Securities With Gross Unrealized Losses Less Than 12 Months, Fair Value	3,304	3,288
Securities With Gross Unrealized Losses Less Than 12 Months, Unrealized Losses	(196)	(212)
Securities With Gross Unrealized Losses 12 Months or More, Fair Value	76,985	76,521
Securities With Gross Unrealized Losses 12 Months or More, Unrealized Losses	(2,015)	(2,479)
Securities With Gross Unrealized Losses, Total Fair Value	80,289	79,809
Securities With Gross Unrealized Losses, Total Unrealized Losses	(2,211)	(2,691)
Collateralized Mortgage Obligations
Available-for-Sale Securities:
Securities With Gross Unrealized Losses 12 Months or More, Fair Value	31,954	33,148
Securities With Gross Unrealized Losses 12 Months or More, Unrealized Losses	(6,229)	(6,227)
Securities With Gross Unrealized Losses, Total Fair Value	31,954	33,148
Securities With Gross Unrealized Losses, Total Unrealized Losses	(6,229)	(6,227)
Held-to-Maturity Securities:
Securities With Gross Unrealized Losses Less Than 12 Months, Fair Value	33,444	81,875
Securities With Gross Unrealized Losses Less Than 12 Months, Unrealized Losses	(423)	(725)
Securities With Gross Unrealized Losses 12 Months or More, Fair Value	166,167	112,339
Securities With Gross Unrealized Losses 12 Months or More, Unrealized Losses	(7,045)	(4,445)
Securities With Gross Unrealized Losses, Total Fair Value	199,611	194,214
Securities With Gross Unrealized Losses, Total Unrealized Losses	(7,468)	(5,170)
FHLMC Certificates
Available-for-Sale Securities:
Securities With Gross Unrealized Losses 12 Months or More, Fair Value	8,479	8,681
Securities With Gross Unrealized Losses 12 Months or More, Unrealized Losses	(1,424)	(1,482)
Securities With Gross Unrealized Losses, Total Fair Value	8,479	8,681
Securities With Gross Unrealized Losses, Total Unrealized Losses	(1,424)	(1,482)
Held-to-Maturity Securities:
Securities With Gross Unrealized Losses 12 Months or More, Fair Value	3,566	3,653
Securities With Gross Unrealized Losses 12 Months or More, Unrealized Losses	(253)	(244)
Securities With Gross Unrealized Losses, Total Fair Value	3,566	3,653
Securities With Gross Unrealized Losses, Total Unrealized Losses	(253)	(244)
FNMA Certificates
Available-for-Sale Securities:
Securities With Gross Unrealized Losses 12 Months or More, Fair Value	49,210	51,517
Securities With Gross Unrealized Losses 12 Months or More, Unrealized Losses	(10,948)	(9,842)
Securities With Gross Unrealized Losses, Total Fair Value	49,210	51,517
Securities With Gross Unrealized Losses, Total Unrealized Losses	(10,948)	(9,842)
Held-to-Maturity Securities:
Securities With Gross Unrealized Losses 12 Months or More, Fair Value	110,822	114,856
Securities With Gross Unrealized Losses 12 Months or More, Unrealized Losses	(5,263)	(4,088)
Securities With Gross Unrealized Losses, Total Fair Value	110,822	114,856
Securities With Gross Unrealized Losses, Total Unrealized Losses	(5,263)	$ (4,088)
GNMA Certificates
Available-for-Sale Securities:
Securities With Gross Unrealized Losses 12 Months or More, Fair Value	101
Securities With Gross Unrealized Losses 12 Months or More, Unrealized Losses	(1)
Securities With Gross Unrealized Losses, Total Fair Value	101
Securities With Gross Unrealized Losses, Total Unrealized Losses	$ (1)