Long-Term Debt And Other Long-Term Liabilities (Long-Term Debt) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Long-term debt and other long-term liabilites [Abstract]
Credit agreement with an average interest rates of 2.9% at December 31, 2012	$ 0	$ 71,100,000
6.625% senior subordinated notes due 2021, net of unamortized discount of $4.3 million and $4.7 million at December 31, 2013 and 2012, respectively	645,696,000	645,259,000
Total long-term debt	645,696,000	716,359,000
Line of Credit Facility, Interest Rate at Period End	0.00%	2.90%
Debt Instrument, Unamortized Discount	$ 4,300,000	$ 4,700,000