Net Purchase Price Paid (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Real Estate Properties [Line Items]
Borrowings withdrawn for acquisition	$ 383,268
Land
Real Estate Properties [Line Items]
Borrowings withdrawn for acquisition	33,390
Building and improvements
Real Estate Properties [Line Items]
Borrowings withdrawn for acquisition	310,390
Furniture, Fixtures and equipment
Real Estate Properties [Line Items]
Borrowings withdrawn for acquisition	25,090
Construction in Progress and Land Held for Development
Real Estate Properties [Line Items]
Borrowings withdrawn for acquisition	$ 14,398