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Investment Securities - Schedule of Securities Available for Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Investment securities available for sale:
Amortized Cost	$ 32,809
Gross Unrealized Gains	0
Gross Unrealized Losses	(274)
Investment securities available for sale	32,535	$ 0
Asset-backed securities
Investment securities available for sale:
Amortized Cost	7,630
Gross Unrealized Gains	0
Gross Unrealized Losses	(24)
Investment securities available for sale	7,606
Mortgage-backed securities, U.S Government-sponsored enterprises
Investment securities available for sale:
Amortized Cost	5,083
Gross Unrealized Gains	0
Gross Unrealized Losses	(44)
Investment securities available for sale	5,039
Collateralized mortgage obligations, U.S. Government-sponsored enterprises
Investment securities available for sale:
Amortized Cost	20,096
Gross Unrealized Gains	0
Gross Unrealized Losses	(206)
Investment securities available for sale	$ 19,890

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- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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