Investment Securities (Gains and Losses on Sales) (Details 3) - 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]
Gain on Sale of Investments	$ 14,180	$ 5,633	$ 14,257	$ 7,663
Gain (Loss) on Sale of Investments	13,216	(776)	12,246	(1,611)
Loss on Sale of Investments	$ (964)	$ (6,409)	$ (2,011)	$ (9,274)