Condensed Combined Statement of Income for Limited Liabilities Accounted for under Equity Method (Parenthetical) (Detail) - Arlington Medical Properties - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Schedule Of Equity Method Investments [Line Items]
Interest income earned on various advances made to LLCs	$ 296,000	$ 0
Percentage of minority ownership purchased from third-party members	10.00%
Cash payment made purchased addition of ownership interest	85.00%		75.00%

Percentage of voting equity interests acquired at the acquisition date in the business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant