Condensed Combined Statement of Income for Limited Liabilities Accounted for under Equity Method (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Equity Method Investments And Joint Ventures [Abstract]
Revenues		$ 3,736	$ 3,585
Operating expenses		1,353	1,337
Depreciation and amortization		613	580
Interest, net		657	619
Net income		1,113	1,049
Our share of net income	[1]	$ 1,059	$ 592

[1] Our share of net income for the three months ended March 31, 2016 includes interest income earned by us on an advance made to Arlington Medical Properties, LLC of approximately $296,000. There were no advances outstanding during the first three months of 2015, therefore there was no interest income earned by us for the three months ended March 31, 2015. Also, as mentioned above, effective February 1, 2016, we purchased an additional 10% of the ownership interest in Arlington Medical Properties, LLC thereby increasing our ownership interest to 85%, from 75% in 2015.