Reconciliation of Net Operating Income to Net Income (Detail) (USD $) In Thousands, unless otherwise specified	2 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Information [Line Items]
Net operating income		$ 10,372	$ 10,338	$ 19,827	$ 20,327
Depreciation and amortization		(4,020)	(3,232)	(7,179)	(6,579)
General and administrative expenses		(2,857)	(954)	(3,574)	(1,788)
Impairment charges		(533)		(533)
Interest expense		(3,289)	(4,217)	(7,204)	(8,344)
Loss on extinguishment of debt		(1,125)		(1,125)
Gain on acquisitions		9,460		9,460
Other income		185	164	452	387
Results from discontinued operations			11		(10)
Income tax benefit		211		211
Net income	$ 8,315	$ 8,404	$ 2,110	$ 10,335	$ 3,993