Investment Securities Debt Securities -Sales (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Available-for-sale Securities, Amortized Cost Basis, Investments Sold, Including Pending Trades	[1]	$ 0	$ 9,828	$ 2,527	$ 11,621
Debt Securities, Available-for-sale, Realized Gain		0	147	100	149
Debt Securities, Available-for-sale, Realized Loss		0	0	0	(3)
Proceeds from Sale of Debt Securities, Available-for-sale Securities, Including Pending Trades		$ 0	$ 9,975	$ 2,627	$ 11,767

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