Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	0 Months Ended	7 Months Ended	12 Months Ended
	Mar. 23, 2012	Jul. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 15, 2014	Aug. 01, 2014
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Estimated useful lives of buildings			40 years
Maturity period of highly liquid investments			three months or less
Allowances for doubtful accounts		$ 185,000		$ 414,000
Deferred financing cost				6,189,000			0
Derivative financial instruments							0
Rent adjustment (decreased) increased revenue		(1,121,000)		(669,000)	2,177,000
Straight line rent receivables				19,760,000
Percentage of taxable income distributed to shareholders			90.00%
Maximum TRS stock, as a percentage of Trust's total assets			25.00%
Income tax expense			0
Deferred tax assets and liabilities, net			0
Maximum percentage of stock to assets			0.00%
Net proceeds	77,563,000				77,563,000
Preferred Shares outstanding				4,820,000
Liquidating distribution per preferred share				$ 25
Liquidation preference plus accrued and unpaid dividends						$ 25.00
Restricted common shares issued				600,000
Series D Preferred Shares of Beneficial Interest [Member]
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Number of Shares Issued / Repurchased	3,220,000
Price of Cumulative Redeemable Preferred Shares	$ 25.0385
Preferred Shares, par value	$ 1
Preferred Shares outstanding		4,820,000		4,820,000
Liquidating distribution per preferred share						$ 25.4815
Overstatement of Other Liabilities [Member]
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Out of period adjustment amount			1,300,000
Overstatement of Depreciation Expense [Member]
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Out of period adjustment amount			21,000
Overstatement of Building [Member]
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Out of period adjustment amount			$ 1,300,000