Investment Securities - Schedule of Present Cost or Amortized Cost and Fair Values of Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Investment securities, held-to-maturity
Amortized cost	$ 695	$ 694
Accumulated unrealized gains	42	43
Accumulated unrealized losses	(10)	0
Fair value	727	737
Investment securities, available-for-sale
Amortized cost	167,935	53,953
Accumulated unrealized gains	37	51
Accumulated unrealized losses	(647)	(41)
Fair value	167,325	53,963
Total investment securities
Amortized cost	168,630	54,647
Accumulated unrealized gains	79	94
Accumulated unrealized losses	(657)	(41)
Fair value	$ 168,052	$ 54,700

Available for sale securities and held to maturity securities accumulated gross unrealized gain before tax.

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Available for sale securities and held to maturity securities accumulated gross unrealized loss before tax.

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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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Amount, before tax, of unrealized loss 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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Amortized cost of 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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Amount of 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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Amount of investment in debt security measured at amortized cost (held-to-maturity).

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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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Sum of the carrying amounts as of the balance sheet date of all investments.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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