Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Effective Income Tax Rate, Percent	33.50%	34.90%	31.60%	36.10%
Valuation Allowance [Abstract]
Valuation Allowance, Amount	$ 0		$ 0		$ 0
Income Tax Uncertainties [Abstract]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	5,900		5,900		7,300
Unrecognized Tax Benefits, Period Increase (Decrease)	(1,300)	$ (1,100)	(2,200)	$ (1,600)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	3,000		3,000		$ 4,700
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	(889)	$ (709)	(1,639)	$ (1,215)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance beginning of period			11,569
Additions based on tax positions related to current year			328
Additions for tax positions of prior years			0
Reductions for tax positions of prior years			(108)
Reductions due to lapse of applicable statute of limitations			(2,374)
Settlements			0
Balance end of period	9,415		9,415
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	(2,200)		(2,200)
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	$ (1,200)		$ (1,200)