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Investment Securities (Investment Securities by Contractual Maturity - HTM) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 367,507	$ 0
Investment securities held-to-maturity	363,653
Due after 10 years | Mortgage-backed securities | FNMA and FHLMC certificates
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	367,507
Gross Unrealized Gains	0
Gross Unrealized Losses	3,854
Investment securities held-to-maturity	$ 363,653
Weighted Average Yield	1.71%

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

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