Income Taxes - Reconciliation of Effective Tax Rate (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Federal statutory tax rate	35.00%	35.00%	35.00%	35.00%
State income taxes, net of federal benefit	(0.50%)	2.20%	0.10%	2.20%
Non-US income taxed at different rates	2.90%	0.00%	0.40%	0.00%
Non-deductible expenses	(2.90%)	0.60%	(2.10%)	0.40%
Domestic production activities deduction	0.60%	(2.70%)	0.40%	(2.70%)
Other	(1.00%)	0.00%	(0.90%)	0.00%
Effective income tax rate	34.10%	35.10%	32.90%	34.90%