Income Taxes (Details Textual) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Operating Loss Carryforwards	$ 230.3
Valuation Allowance	96.8	$ 95.3
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 104.4
State and Local Jurisdiction [Member] | Maximum [Member]
Operating Loss Carryforward Expiration Year	2034
State and Local Jurisdiction [Member] | Minimum [Member]
Operating Loss Carryforward Expiration Year	2029
Federal [Member]
Operating Loss Carryforwards	$ 230.3
Operating Loss Carryforward Expiration Year	2034
New York State [Member]
Discontinued Operation, Tax Effect of Adjustment to Prior Period Gain (Loss) on Disposal	$ 31.1
New York City [Member]
Discontinued Operation, Tax Effect of Adjustment to Prior Period Gain (Loss) on Disposal	$ 25.5