Income Taxes (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Effective tax rate	31.20%	32.10%	31.40%	32.10%
Unrecognized tax benefits					$ 31,000,000
Unrecognized tax benefits adjusted					27,800,000
Amount of unrecognized tax benefits where significant change is reasonably possible	0		0		5,600,000
Accrued income tax interest and penalties					$ 6,200,000