Income Taxes (Provision (Benefit) for Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Current:
Federal Current	$ (12,151)		$ 15,500		$ 3,378
State Current	1,080		3,189		820
Total Current	(11,071)		18,689		4,198
Deferred:
Federal Deferred	409,359		(388,209)		345,922
State Deferred	87,823		(71,582)		60,941
Foreign Deferred	763		(2,037)		2,160
Total Deferred	497,945		(461,828)		409,023
Total provision for income taxes	$ 486,874	[1]	$ (443,139)	[1]	$ 413,221	[1]

[1] Interest expense and the provision (benefit) for income taxes by segment are an allocation of corporate amounts as they are incurred at the corporate level.