Investments (Gross Gains And Losses Realized) (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investments [Abstract]
Equity Securities, FV-NI, Unrealized Gain					$ 208
Equity Securities, FV-NI, Unrealized Loss					(298)
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ (1,246)	$ 384	$ 492	$ 280	(90)
Gross unrealized gains recognized on securities still held					0	$ 4,476	$ 3,978
Gross unrealized losses recognized on securities still held					0	0	(465)
Net unrealized gains (losses) recognized on securities still held					$ 0	$ 4,476	$ 3,513