Investments - Schedule of Available for Sale Investment Purchases, Proceeds and Gains & Losses (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Purchases of AFS securities	$ 158,357	$ 253,415	$ 192,288
Proceeds from maturities, calls and prepayments of AFS securities	84,923	36,459	30,089
Gross proceeds from sales of AFS securities	35,603	170,495	56,191
Gains (losses) realized on sales of AFS securities	528	1,312	(789)
Gains (losses) realized on maturities, calls and prepayments of AFS securities	0	0	(30)
Debt Securities, Available-for-sale, Realized Gain	594	1,558	50
Debt Securities, Available-for-sale, Realized Loss	$ (66)	$ (246)	$ (839)

Available-for-sale Securities, Gross Realized Gain (Loss) on Redemptions

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Amount of realized gain 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 of realized gain (loss) 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 of cash outflow to acquire 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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