Investment Securities, Available-for-sale Securities, Transaction Information (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Proceeds from sales and calls of securities available for sale, gross realized gains and gross realized losses [Abstract]
Proceeds from sales		$ 0	$ 0	$ 0	$ 29,219
Proceeds from calls/paydowns		47,100	43,052	123,550	197,667
Proceeds from maturities		3,500	0	8,555	5,000
Gross realized gains	[1]	0	0	0	1,155
Gross realized losses		0	0	0	0
Sales and transfers of available for sale securities		$ 0	$ 0	$ 0	$ 0

[1] Not within the scope of ASC 606.