Income Taxes (Unrecognized Tax Benefits Reconciliation Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits	$ 4,957	$ 8,444	$ 31,616	$ 31,900
Penalties and interest related to income tax examinations	200	800	600
Interest released	600
Cumulative accrued balance of penalties and interest related to income tax examinations	500	$ 900	$ 5,000
Expected increase in unrecognized tax benefits in the next twelve months	$ 2,800