Investment Securities - Summary of Credit Rating of Debt Securities Portfolio (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total available for sale securities		$ 153,416	$ 197,803
Total held to maturity securities		1,051,997	977,061
Municipal Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total held to maturity securities		96,405	105,081
Corporate Debt Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total available for sale securities		1,000	1,764
Total held to maturity securities		250	6,997
U.S. Government Sponsored Enterprise Obligations
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total available for sale securities		19,733	23,011
U.S. Treasury Notes
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total held to maturity securities		3,970
AAA/AA/A
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total available for sale securities		152,416	196,798
Total held to maturity securities		1,051,997	977,061
AAA/AA/A | Municipal Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total held to maturity securities		96,405	105,081
AAA/AA/A | Corporate Debt Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total available for sale securities			759
Total held to maturity securities		250	6,997
AAA/AA/A | U.S. Government Sponsored Enterprise Obligations
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total available for sale securities		19,733	23,011
AAA/AA/A | U.S. Treasury Notes
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total held to maturity securities		3,970
BBB/BB/B
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total available for sale securities		1,000	1,005
BBB/BB/B | Corporate Debt Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total available for sale securities		1,000	1,005
Mortgage Backed Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total available for sale securities	[1]	132,683	173,028
Total held to maturity securities	[1]	951,372	864,983
Mortgage Backed Securities | AAA/AA/A
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total available for sale securities	[1]	132,683	173,028
Total held to maturity securities	[1]	$ 951,372	$ 864,983

[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 GSE or agency and therefore carries an implicit guarantee of the U.S. government. These have been categorized as AAA/AA/A.