Securities - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	$ 825,137	$ 90,766
AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	549,327	83,095
AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	270,909	7,671
A
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	1,068
BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	3,000
Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	833
U.S. Treasury and U.S. government agencies
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	18,672	25,565
U.S. Treasury and U.S. government agencies | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	18,672	25,565
U.S. Treasury and U.S. government agencies | AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0	0
U.S. Treasury and U.S. government agencies | A
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
U.S. Treasury and U.S. government agencies | BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
U.S. Treasury and U.S. government agencies | Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
Mortgage-backed securities, residential
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	370,247	39,276
Mortgage-backed securities, residential | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	370,247	39,276
Mortgage-backed securities, residential | AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0	0
Mortgage-backed securities, residential | A
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
Mortgage-backed securities, residential | BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
Mortgage-backed securities, residential | Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
Collateralized mortgage obligations, residential
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	13,921	14,590
Collateralized mortgage obligations, residential | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	13,921	14,590
Collateralized mortgage obligations, residential | AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0	0
Collateralized mortgage obligations, residential | A
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
Collateralized mortgage obligations, residential | BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
Collateralized mortgage obligations, residential | Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
Mortgage-backed securities, multifamily
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	2,710	705
Mortgage-backed securities, multifamily | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	2,710	705
Mortgage-backed securities, multifamily | AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0	0
Mortgage-backed securities, multifamily | A
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
Mortgage-backed securities, multifamily | BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
Mortgage-backed securities, multifamily | Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
Obligations of states and political subdivisions
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	416,587	10,630
Obligations of states and political subdivisions | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	143,777	2,959
Obligations of states and political subdivisions | AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	270,909	$ 7,671
Obligations of states and political subdivisions | A
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	1,068
Obligations of states and political subdivisions | BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
Obligations of states and political subdivisions | Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	833
Debt securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	3,000
Debt securities | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
Debt securities | AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
Debt securities | A
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	0
Debt securities | BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	3,000
Debt securities | Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	$ 0