Income Taxes (Provision (Benefit) For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Current federal tax expense (benefit)		$ (248)	$ 260
Deferred federal tax expense (benefit)	$ 3,702	(31,957)	(129)
Current state tax expense (benefit)	48	29	54
Deferred state tax expense (benefit)	1,687	(1,598)	(508)
Current foreign tax expense (benefit)		13	146
Income tax provision (benefit)	$ 5,437	$ (33,761)	$ (177)