Derivative Instruments and Hedging Activities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended				1 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Accrued Liabilities [Member]	Dec. 31, 2013 Accrued Liabilities [Member]	Jun. 30, 2014 Cash Flow Hedging [Member] Interest Expense [Member] Interest Rate Swap [Member]	Jun. 30, 2013 Cash Flow Hedging [Member] Interest Expense [Member] Interest Rate Swap [Member]	Jun. 30, 2014 Cash Flow Hedging [Member] Interest Expense [Member] Interest Rate Swap [Member]	Jun. 30, 2013 Cash Flow Hedging [Member] Interest Expense [Member] Interest Rate Swap [Member]	Jun. 30, 2014 Old Credit Facilities [Member]	Jun. 30, 2014 Old Credit Facilities [Member] Term Loans Rate	Jul. 17, 2014 New policy [Member] Term Loans
Derivative [Line Items]
Interest Rate Derivative Liabilities, at Fair Value					$ 0	$ 927
Derivative, Fixed Interest Rate												1.11%
Derivative, Maturity Years												3 years	3 years
Derivative, Maturity Date											Jul. 01, 2014
Derivative, Basis Spread on Variable Rate												1.95%
Debt Instrument, Interest Rate at Period End												3.06%
Derivative Instruments, Loss Recognized in Other Comprehensive Income (Loss), Effective Portion	(3)	27	23	34
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net							$ 480	$ 457	$ 950	$ 906