Investment Securities - Gross Unrealized Losses on Available-for-sale Securities and the Related Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	$ 160,432	$ 58,138
Less than 12 months, unrealized losses	(1,435)	(170)
More than 12 months, fair value	1,042	2,967
More than 12 months, unrealized losses	(3)	(24)
Fair Value	161,474	61,105
Unrealized Losses	(1,438)	(194)
U.S. Treasury and government sponsored entities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	147,465	31,270
Less than 12 months, unrealized losses	(1,397)	(47)
More than 12 months, fair value	0	0
More than 12 months, unrealized losses	0	0
Fair Value	147,465	31,270
Unrealized Losses	(1,397)	(47)
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	12,967	23,670
Less than 12 months, unrealized losses	(38)	(118)
More than 12 months, fair value	1,042	2,967
More than 12 months, unrealized losses	(3)	(24)
Fair Value	14,009	26,637
Unrealized Losses	$ (41)	(142)
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value		3,198
Less than 12 months, unrealized losses		(5)
More than 12 months, fair value		0
More than 12 months, unrealized losses		0
Fair Value		3,198
Unrealized Losses		$ (5)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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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), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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