Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	36 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
U.S. Federal income tax rate	35.00%
net operating loss carryforwards	$ 102,100
Annual limitation on utilization of net operating loss carryforwards	500
Deferred tax assets, various state	25,200
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	31,800
Undistributed earnings of foreign subsidiaries	52,000
Unrecorded tax benefits	$ 29,715	$ 30,344	$ 29,899	$ 26,399