Acquisitions and Dispositions - Schedule of Total Revenues and Net Income Attributable to Acquisitions (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2013
Management Internalization [Member]
Business Acquisition [Line Items]
Total revenues	$ 959
Net (loss) / income	(13,818)
Alaska Joint Venture Acquisition [Member]
Business Acquisition [Line Items]
Total revenues	19,624
Net (loss) / income	54
2013 RJ Transaction [Member]
Business Acquisition [Line Items]
Total revenues	640
Net (loss) / income	$ (111)