Income Taxes Income Taxes Parenthetical (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Effective income tax rate	(3.40%)	31.50%	5.80%	31.50%