Equity Investments - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014 WRT-Elad Equity/Lender (Sullivan Center) [Member]	Mar. 31, 2014 CDH CDO LLC [Member]	Mar. 31, 2013 CDH CDO LLC [Member]	Feb. 28, 2014 WRT One South State Lender LP [Member]	Feb. 28, 2013 WRT One South State Lender LP [Member]	Feb. 28, 2014 Vintage Housing Holdings [Member]	Feb. 28, 2013 Vintage Housing Holdings [Member]	Mar. 31, 2014 Concord Debt Holdings LLC [Member]	Dec. 31, 2013 701 7th WRT Investors LLC [Member]	Dec. 31, 2012 701 7th WRT Investors LLC [Member]
Schedule of Equity Method Investments [Line Items]
Difference in carrying value of investments	$ 10,435,000
Revenues		3,545,000	5,037,000	2,472,000	1,402,000	11,519,000	10,579,000		0	0
Net income		3,346,000	5,957,000	2,472,000	1,379,000	1,754,000	3,355,000		0	0
Cash distributions amount		433,000						266,000
Net income loss		$ 18,772,000						$ 40,403,000