Income Taxes - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	27.70%	24.30%	29.40%	25.60%