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Income Taxes Reconciliation of statutory federal income tax rate to effective income tax rate (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Contingency [Line Items]
Income taxes at federal statutory rate	35.00%	35.00%	35.00%
Effect of state and local income taxes, net of federal tax	2.80%	3.00%	4.00%
Deferred tax asset valuation allowance	0.40%	(6.60%)	(438.00%)
Tax contingencies	0.10%	(1.40%)	0.30%
Other	1.20%	1.20%	2.30%
Effective rate	39.50%	31.20%	(396.40%)
Maximum [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards, expiration dates	Jan. 01, 2032

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax contingencies. Includes, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYY-MM-DD format.

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