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Investment Securities and Fair Value Measurements - Schedule of Sales, Calls and Maturities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Debt Securities, Available-for-sale [Line Items]
Gross Realized Gains			$ 6	$ 33
Gross Realized Losses			0	0
Gross Proceeds from Sales			42,198	13,942
Gross Proceeds from Maturities			26,750	7,750
Interest income, net of amortization and accretion of premium and discount	$ 100	$ 100	100	200
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Gross Realized Gains				5
Gross Realized Losses				0
Gross Proceeds from Sales				4,006
Gross Proceeds from Maturities				4,000
Agency securities
Debt Securities, Available-for-sale [Line Items]
Gross Realized Gains			0	24
Gross Realized Losses			0	0
Gross Proceeds from Sales			0	7,878
Gross Proceeds from Maturities			5,250	1,250
Treasury securities
Debt Securities, Available-for-sale [Line Items]
Gross Realized Gains			6	4
Gross Realized Losses			0	0
Gross Proceeds from Sales			42,198	2,058
Gross Proceeds from Maturities			$ 21,500	$ 2,500