Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Effective income tax rates	(40.60%)	28.50%	(7.90%)	27.70%
Statutory federal income tax rate			35.00%
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Expected income tax expense (benefit) at 35%	$ (49,106,000)	$ 7,417,000	$ (86,360,000)	$ 17,282,000
Foreign taxes (tax rate differential and foreign tax differences)	9,124,000	(919,000)	9,052,000	(4,083,000)
Nondeductible expenses and other	819,000	(133,000)	(30,000)	371,000
Deferred tax asset valuation allowance	96,117,000	(328,000)	96,788,000	96,000
Total income tax expense	56,954,000	6,037,000	19,450,000	13,666,000
Unrecognized tax benefits	$ 2,100,000		$ 2,100,000