Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Contingency [Line Items]
Reduction in income tax expense, net of the related federal tax effects, that would result in a realization of unrecognized tax benefits	$ 973
Accrued liabilities for interest and penalties related to uncertain tax positions	437	$ 469	$ 1,100
Interest and penalties on uncertain tax positions, income tax expense	194	247	$ 224
Reduction in income tax expense, net of the related deferred tax effects, that would result in a realization of unrecognized tax benefits for the reversal of accrued interest and penalties	329
Base year bad debt reserves	165,800	165,800
Unrecognized deferred federal income tax liability	58,000	58,000
New York State
Income Tax Contingency [Line Items]
Increase in net deferred tax asset		15,700
Decrease in taxes resulting from state tax legislation		15,700
Income tax benefit from effect of enacted change in tax law		$ 11,400
Net operating loss carryforwards	202,300
New York City
Income Tax Contingency [Line Items]
Net operating loss carryforwards	$ 74,700