Income Taxes - Reconciliation of Effective Tax Rate (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
U.S. federal statutory tax rate	35.00%	35.00%	35.00%	35.00%
State income taxes, net of federal benefit	5.70%	1.80%	(1.80%)	2.10%
Non-U.S. income taxed at different rates	(29.10%)	0.00%	4.20%	0.00%
Non-deductible expenses	0.20%	(0.20%)	(2.40%)	0.10%
Domestic production activities deduction	3.60%	(1.90%)	(0.00%)	(2.40%)
Return to accrual adjustments	(0.00%)	(4.90%)	(0.00%)	(1.80%)
Other	1.40%	0.00%	(0.10%)	0.00%
Effective income tax rate	16.80%	29.80%	34.90%	33.00%