Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$ 9,800	$ 8,600	$ 7,100
Percentage of weighted average cost of capital	13.90%	15.00%
Loss Contingencies
Pre-tax environmental costs	$ 1,500
Severance	3,716	$ 0	0
Restructuring charges			$ 1,900
Selling, General and Administrative Expenses
Loss Contingencies
Reserve for contingent obligation	$ 1,100