Equity Investments - Additional Information (Detail) - USD ($)		3 Months Ended
	Apr. 27, 2016	Jun. 30, 2016	Mar. 31, 2016
701 Seventh WRT Investor LLC [Member]
Schedule of Equity Method Investments [Line Items]
Additional capital contributions			$ 5,197,000
Capital contributions			$ 120,686,000
701 Seventh WRT Investor LLC [Member] | Subsequent Event [Member]
Schedule of Equity Method Investments [Line Items]
Additional capital contributions		$ 1,345,000
Capital contributions		$ 125,000,000
Sullivan Center, Chicago [Member] | Chicago, IL [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of funded loan for retail tenant improvements and capital expenditure			100.00%
Percentage of funded loan needed for office tenant improvements and capital expenditure			80.00%
Fund received for tenant improvements			$ 2,794,000
Accrued interest rate on loan funded			15.00%
WRT One South State Lender LP and WRT Elad One South State Equity LP [Member] | Subsequent Event [Member]
Schedule of Equity Method Investments [Line Items]
Gross proceeds from sale of equity investments	$ 95,270,000