Income Taxes (Computation Of Income Tax (Benefit) Expense By Applying U.S. Federal Statutory Tax Rate To Income (Loss) Before Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]
Income tax expense at the statutory rate of 35.0%	$ 21,932	$ 24,595	$ 19,940
Provision to return and deferred tax adjustments	(1,637)	200	(190)
Change in federal and state effective tax rates			(780)
State tax, net of federal benefit	2,275	1,858	2,418
Permanent adjustments	(115)	322	341
Foreign subsidiary tax rate differences	1,252	120	139
Impact of entity restructuring	15,501		(37,019)
Foreign subsidiary change in statutory rate			524
Other	(6)	67	256
Subtotal	39,202	27,162	(14,371)
Change in valuation allowance	2,816	(153)	1,195
Total income tax expense (benefit)	$ 42,018	$ 27,009	$ (13,176)
U.S. federal statutory tax rate	35.00%	35.00%	35.00%