Income Taxes Components of Income Tax Expense (Benefit) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Components of Income Tax Expense (Benefit) [Line Items]
Provision (benefit) for income taxes	$ 145,973	$ 43,697	$ (6,674)
Current Taxes [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Provision (benefit) for income taxes	153,624	11,494	675
Deferred Taxes [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Provision (benefit) for income taxes	(7,651)	32,203	(7,349)
U.S. Federal [Member] | Current Taxes [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Provision (benefit) for income taxes	41,551	16,430	0
U.S. Federal [Member] | Deferred Taxes [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Provision (benefit) for income taxes	(2,977)	(2,075)	0
State and Local Jurisdiction [Member] | Current Taxes [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Provision (benefit) for income taxes	4,778	604	57
State and Local Jurisdiction [Member] | Deferred Taxes [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Provision (benefit) for income taxes	(236)	0	0
Foreign Tax Authority [Member] | Current Taxes [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Provision (benefit) for income taxes	107,295	(5,540)	618
Foreign Tax Authority [Member] | Deferred Taxes [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Provision (benefit) for income taxes	$ (4,438)	$ 34,278	$ (7,349)