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Securities - Held-to-Maturity Securities Held by Company (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 303,524	$ 284,009
Gross Unrealized Gains	0	668
Gross Unrealized Losses	22,607	2,389
Fair Value	280,917	282,288
U.S. Treasuries
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	86,635	86,689
Gross Unrealized Gains	0	279
Gross Unrealized Losses	6,002	600
Fair Value	80,633	86,368
Obligations of U.S. Government sponsored entities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	216,889	197,320
Gross Unrealized Gains	0	389
Gross Unrealized Losses	16,605	1,789
Fair Value	$ 200,284	$ 195,920

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Amount excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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