Interest Rate Derivative Instruments - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended						12 Months Ended
	Dec. 31, 2013	Feb. 08, 2012 Interest Rate Cap [Member]	Dec. 31, 2013 Interest Rate Swap [Member]	Dec. 31, 2012 Interest Rate Swap [Member]	Dec. 31, 2011 Interest Rate Swap [Member]	Feb. 08, 2013 Interest Rate Swap [Member]	Dec. 31, 2013 Interest Rate Swap [Member] Fair Value Measurements, Level 2 [Member]	Dec. 31, 2012 Interest Rate Swap [Member] Fair Value Measurements, Level 2 [Member]	Dec. 31, 2013 Cash Flow Hedging [Member]	Dec. 31, 2012 Cash Flow Hedging [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Interest Rate Cap [Member]	Feb. 08, 2012 Cash Flow Hedging [Member] Interest Rate Cap [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Interest Rate Cap [Member] LIBOR [Member]	Feb. 29, 2012 Cash Flow Hedging [Member] Interest Rate Swap [Member]	Feb. 08, 2012 Cash Flow Hedging [Member] Interest Rate Swap [Member]
Derivative [Line Items]
Derivative instruments, notional amount		$ 150,000,000				$ 150,000,000					$ 50,000,000	$ 150,000,000		$ 150,000,000	$ 150,000,000
Capped LIBOR rate		2.05%											3.00%
Unrealized gains or losses on cash flow hedge derivative effective portion									300,000	800,000
Interest expense related to payments on interest rate swaps	2,049,000		500,000	500,000	4,800,000
Interest rate swap liability recorded at fair value							$ 500,000	$ 800,000