Income Taxes (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Effective Income Tax Rate, Percent	37.70%	31.60%
Valuation Allowance [Abstract]
Valuation Allowance, Amount	$ 0		$ 0
Income Tax Uncertainties [Abstract]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	7,700,000		8,000,000
Unrecognized Tax Benefits, Period Increase (Decrease)	(500,000)	(500,000)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	5,200,000		5,700,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	(506,000)	(700,000)
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound	(1,000,000)
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound	(2,000,000)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance beginning of period	12,632,000
Additions based on tax positions related to current year	232,000
Additions for tax positions of prior years	0
Reductions for tax positions of prior years	(90,000)
Reductions due to lapse of applicable statute of limitations	(675,000)
Settlements	0
Balance end of period	$ 12,099,000