Income Taxes Income Taxes - Reconciliation of Statutory Federal Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
U.S. federal statutory rate	35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent	2.30%	8.60%	6.80%
State and local income taxes, net of federal income tax	1.10%	1.70%	0.40%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent	(21.20%)	(29.80%)	(14.00%)
Foreign valuation allowances	1.00%	2.30%	0.00%
Adjustments for uncertain tax positions	(12.90%)	1.20%	2.30%
Tax credits and other	0.60%	(4.50%)	(10.40%)
Unremitted earnings, net of foreign tax credits	(1.00%)	(4.60%)	35.20%
Effective rate	4.90%	9.90%	55.30%