Reit Conversion - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended
	Oct. 01, 2012	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 REIT Conversion [Member]	Sep. 30, 2013 REIT Conversion [Member]	Sep. 30, 2014 REIT Conversion [Member]	Sep. 30, 2013 REIT Conversion [Member]
Real Estate Properties [Line Items]
Sales price of management rights and intellectual property	$ 210,000,000
Purchase price to the Management Rights	190,000,000
Purchase price IP Rights	20,000,000
Term of management rights for income amortization			65 years
REIT conversion costs		971,000		21,383,000	0	1,000,000	0	21,400,000
Employment severance and retention costs						400,000		14,300,000
Professional fees						100,000		2,100,000
Various other transition costs						$ 500,000		$ 5,000,000