Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Effective Income Tax Rate, Percent	34.90%	34.80%	36.10%	33.70%
Valuation Allowance [Abstract]
Valuation Allowance, Amount	$ 0		$ 0		$ 0
Income Tax Uncertainties [Abstract]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	7,000		7,000		8,000
Unrecognized Tax Benefits, Period Increase (Decrease)	(1,100)	$ (800)	(1,600)	$ (1,300)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	4,400		4,400		$ 5,700
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	(709)	$ (500)	(1,215)	$ (1,208)
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			434
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	11,049		11,049
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	(2,000)		(2,000)
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	$ (1,000)		$ (1,000)