Investment Securities Unrealized Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Net Gain on Equity Securities	$ 223	$ 0	$ 241	$ 0
Less: Net gain (loss) recognized during the reporting period on equity securities sold during the period	0		0
Unrealized net gain recognized during the reporting period on equity securities still held at the reporting date	$ 223		$ 241