Investment Securities Debt Securities -Sales (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Available-for-sale Securities, Amortized Cost Basis, Investments Sold, Including Pending Trades	[1]	$ 2,527	$ 1,793
Debt Securities, Available-for-sale, Realized Gain		100	2
Debt Securities, Available-for-sale, Realized Loss		0	(3)
Proceeds from Sale of Debt Securities, Available-for-sale Securities, Including Pending Trades		$ 2,627	$ 1,792

[1] Amortized cost of investments sold is determined on a specific identification basis and includes pending trades based on trade date, if applicable.