Investment in Unconsolidated Affiliated Real Estate Entity (Unaudited Condensed Balance Sheet) (Details) (1407 Broadway Mezz II, LLC [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule Of Condensed Consolidating Balance Sheets [Line Items]
Equity Method Investment, assets	$ 158,875	$ 152,956
Member capital	16,674	13,614
Total liabilities and members' capital	158,875	152,956
Real estate, at cost (net) [Member]
Schedule Of Condensed Consolidating Balance Sheets [Line Items]
Equity Method Investment, assets	122,937	121,304
Intangible Assets [Member]
Schedule Of Condensed Consolidating Balance Sheets [Line Items]
Equity Method Investment, assets	16	28
Cash and restricted cash [Member]
Schedule Of Condensed Consolidating Balance Sheets [Line Items]
Equity Method Investment, assets	14,101	8,951
Other Assets [Member]
Schedule Of Condensed Consolidating Balance Sheets [Line Items]
Equity Method Investment, assets	21,821	22,673
Mortgage payable [Member]
Schedule Of Condensed Consolidating Balance Sheets [Line Items]
Equity Method Investment, liabilities	125,917	126,000
Other Liabilities [Member]
Schedule Of Condensed Consolidating Balance Sheets [Line Items]
Equity Method Investment, liabilities	$ 16,284	$ 13,342