Summary of Outstanding Mortgages, Excluding Net Debt Premium (Parenthetical) (Detail) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended
		Apr. 30, 2017	Mar. 31, 2017	Mar. 31, 2016
Debt Instrument [Line Items]
Repayments of mortgage loan			$ 11,174	$ 790
Peace Health fixed rate mortgage loan
Debt Instrument [Line Items]
Maturity date	[1]		2017-04
Peace Health fixed rate mortgage loan | Subsequent Event
Debt Instrument [Line Items]
Repayments of mortgage loan		$ 20,200
Medical Center of Western Connecticut fixed rate mortgage loan
Debt Instrument [Line Items]
Maturity date	[2]		2017-06
Auburn Medical II floating rate mortgage loan
Debt Instrument [Line Items]
Maturity date	[3]		2017-07

[1] During April, 2017, upon its maturity, this $20.2 million fixed rate mortgage loan on the Peace Health Medical Clinic was repaid utilizing borrowings under our Credit Agreement.

[2] Upon its June, 2017 maturity date, we intend to repay this loan utilizing borrowings under our Credit Agreement.

[3] The maturity date on this loan has been extended to July, 2017, at which time we intend to repay the loan utilizing borrowings under our Credit Agreement.