Shareholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		12 Months Ended
	Mar. 16, 2018	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Class Of Stock [Line Items]
Common stock, dividend paid		$ 29	$ 105
Plaz America
Class Of Stock [Line Items]
Acquired the non-controlling interests	$ 343		$ 343
Acquired the non-controlling interests carrying amount	$ 3,582
Restricted Stock
Class Of Stock [Line Items]
Common stock, dividend paid		29
Preferred Stock
Class Of Stock [Line Items]
Dividends unpaid and arrears		20,250
Preferred Stock | RAIT Joint Venture VIE
Class Of Stock [Line Items]
Cumulative redeemable preferred shares, shares issued				125
Weighted-average price per share				$ 1,000
Preferred share issuance, net of costs incurred				$ 76
Common Shares
Class Of Stock [Line Items]
Total shareholders’ equity, deficit		$ 186,915