Income Taxes (Reconciliation Of Income Tax Rates) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Statutory rate, Percent	35.00%	35.00%	35.00%
Foreign tax rate differential, Percent	0.30%	0.80%	(2.20%)
State income tax, net of federal benefit, Percent	2.00%	0.30%	2.70%
Non-deductible goodwill impairment, Percent	(7.80%)	(25.20%)	0.00%
Nondeductible expenses, Percent	(0.20%)	(0.90%)	1.80%
Domestic production activities deduction, Percent	(0.50%)	1.00%	(2.20%)
Change in liability for unrecognized tax benefits, Percent		0.40%	(0.80%)
Change in permanent reinvestment assertion, Percent	(5.40%)	0.00%	0.00%
Change in valuation allowance, Percent	(20.20%)	0.00%	0.00%
Other, Percent	0.50%	0.70%	0.00%
Effective income tax rate, total	3.70%	12.10%	34.30%
Statutory rate, Amount	$ (51,509)	$ (17,702)	$ 13,671
Foreign tax rate differential, Amount	(485)	(419)	(870)
State income taxes, net of federal benefit, Amount	(2,893)	(159)	1,065
Non-deductible goodwill impairment, Amount	11,448	12,737
Non-deductible expenses, Amount	262	452	708
Domestic production activities deduction, Amount	700	(507)	(851)
Change in liability for unrecognized tax benefits, Amount	42	(198)	(327)
Change in permanent reinvestment assertion, Amount	7,932
Change in valuation allowance, Amount	29,719
Other, Amount	(725)	(336)	8
Total income tax (benefit) expense	$ (5,509)	$ (6,132)	$ 13,404