Income Taxes (Provision For Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Expense (Benefit) [Abstract]
Current, Federal	$ 191,006	$ 135,232	$ 138,221
Current, State	4,221	12,177	6,919
Current, Foreign	13,189	5,776	4,486
Total Current	208,416	153,185	149,626
Deferred, Federal	121,934	104,723	(18,428)
Deferred, State	7,697	(12,201)	(1,361)
Deferred, Foreign	(460)	(1,121)	963
Total, Deferred	129,171	91,401	(18,826)
Total Current and Deferred	$ 337,587	$ 244,586	$ 130,800