Investment Securities - Summary of Carrying Amounts of Securities and Their Approximate Fair Values (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Available for sale securities, Amortized Cost		$ 159,483	$ 163,376
Available for sale securities, Gross Unrealized Gains		1	4
Available for sale securities, Gross Unrealized Losses		(26,262)	(25,542)
Total available for sale securities		133,222	137,838
Held to maturity securities, Amortized Cost		940,618	959,332
Held to maturity securities, Gross Unrealized Gains		31	41
Held to maturity securities, Gross Unrealized Losses		(163,266)	(153,945)
Held-to-maturity securities, fair value		777,383	805,428
Total, Amortized Cost		1,100,101	1,122,708
Total, Gross Unrealized Gains		32	45
Total, Gross Unrealized Losses		(189,528)	(179,487)
Total, Fair Value		910,605	943,266
U.S. Government Sponsored Enterprise Obligations
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Available for sale securities, Amortized Cost		22,999	22,998
Available for sale securities, Gross Unrealized Losses		(2,638)	(2,536)
Total available for sale securities		20,361	20,462
U.S. Treasury Notes
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Held to maturity securities, Amortized Cost		3,053	3,039
Held to maturity securities, Gross Unrealized Losses		(19)	(13)
Held-to-maturity securities, fair value		3,034	3,026
Corporate Debt Securities
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Held to maturity securities, Amortized Cost		250	250
Held to maturity securities, Gross Unrealized Losses			(2)
Held-to-maturity securities, fair value		250	248
Mortgage Backed Securities
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Available for sale securities, Amortized Cost		136,484	140,378
Available for sale securities, Gross Unrealized Gains		1	4
Available for sale securities, Gross Unrealized Losses		(23,624)	(23,006)
Total available for sale securities	[1]	112,861	117,376
Held to maturity securities, Amortized Cost	[1]	854,043	871,426
Held to maturity securities, Gross Unrealized Gains		26	17
Held to maturity securities, Gross Unrealized Losses		(154,698)	(146,397)
Held-to-maturity securities, fair value		699,371	725,046
Municipal Securities
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Held to maturity securities, Amortized Cost		83,272	84,617
Held to maturity securities, Gross Unrealized Gains		5	24
Held to maturity securities, Gross Unrealized Losses		(8,549)	(7,533)
Held-to-maturity securities, fair value		$ 74,728	$ 77,108

[1] Includes agency mortgage-backed pass-through securities and collateralized mortgage obligations issued by U.S. Government Sponsored Enterprises (“GSEs”) and U.S. government agencies, such as FNMA, FHLMC, and GNMA that are not rated by Moody’s or Standard & Poor's. Each security contains a guarantee by the issuing U.S. GSE or agency and therefore carries an implicit guarantee of the U.S. government. These have been categorized as AAA/AA/A.