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Derivatives - Additional Information (Detail) (USD $)	12 Months Ended						12 Months Ended
Derivatives - Additional Information (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Fair Value, Observable inputs, Level 2	Dec. 31, 2012 Fair Value, Observable inputs, Level 2	Dec. 31, 2013 Fair Value, Observable inputs, Level 2 Other Long Term Liabilities	Dec. 31, 2012 Fair Value, Observable inputs, Level 2 Other Long Term Liabilities	Dec. 31, 2013 Interest Rate Swap Agreements	Dec. 31, 2012 Interest Rate Swap Agreements	Dec. 31, 2013 Interest Rate Swap Agreements Adjusted LIBOR Rate	Mar. 31, 2013 Interest Rate Swap Agreements Adjusted LIBOR Rate
Derivative [Line Items]
Notional amount							$ 29,800,000
Commencement date							2013-03
Expiry date							Jun. 30, 2018
Annual interest rate									1.05%	6.05%
Derivative fair value adjustment gain (loss), net of tax	241,000	(272,000)					241,000	(272,000)
Fair value of derivative instruments, liability			$ 54,000	$ 454,000	$ 48,000	$ 454,000

Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset against a right to receive collateral under a master netting arrangement.

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- Definition

Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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