Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Payments for Repurchase of Common Stock			$ 30,858
Effective Income Tax Rate, Percent	39.40%	37.20%	37.00%	35.00%
Valuation Allowance [Abstract]
Valuation Allowance, Amount	$ 0		$ 0
Income Tax Uncertainties [Abstract]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	7,100		7,100		$ 8,000
Unrecognized Tax Benefits, Period Increase (Decrease)	200	$ 300	(1,400)	$ (1,000)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	4,600		4,600		$ 5,700
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	100	$ 100	(1,111)	$ (1,090)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance beginning of period			12,632
Additions based on tax positions related to current year			635
Additions for tax positions of prior years			0
Reductions for tax positions of prior years			(90)
Reductions due to lapse of applicable statute of limitations			(1,927)
Settlements			0
Balance end of period	11,250		11,250
Maximum [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound	(2,700)		(2,700)
Minimum [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound	$ (1,700)		$ (1,700)