Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Effective Income Tax Rate, Percent	28.60%	29.30%
Valuation Allowance [Abstract]
Valuation Allowance, Amount	$ 0		$ 0
Income Tax Uncertainties [Abstract]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	4,800		5,700
Unrecognized Tax Benefits, Period Increase (Decrease)	(1,700)	$ (800)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	2,400		$ 3,200
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	(790)	$ (750)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance beginning of period	8,751
Additions based on tax positions related to current year	70
Additions for tax positions of prior years	0
Reductions for tax positions of prior years	(415)
Reductions due to lapse of applicable statute of limitations	(1,293)
Settlements	(17)
Balance end of period	7,096
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	(2,900)
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	$ (1,900)