Summary of Interest Rate Swap Agreement Designated as Hedge Agreements (Detail) - Interest Rate Swap $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Interest Rate Swaps [Line Items]
Nominal Amount	$ 100,000
Effective Date	Nov. 01, 2011
Pay Rate	1.715%
Receive Rate	1-Month LIBOR
Expiration Date	Apr. 01, 2016
Estimated Total Fair Value at September 30, 2015	$ 781	[1]

[1] Included in accounts payable and accrued expenses on the condensed consolidated balance sheet as of September 30, 2015.