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Components of Accumulated Other Comprehensive Loss, Net (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Accumulated translation adjustment:      
Balance at beginning of year $ (5,881) $ (5,177) $ (6,265)
Translation adjustment during period 3,077 (704) 1,088
Balance at end of year (2,804) (5,881) (5,177)
Accumulated effect of retirement benefit obligations:      
Net loss arising from retirement benefit obligations, net of tax (1,187)    
Amounts reclassified from accumulated other comprehensive loss:      
Amortization of loss, net of tax 27 [1]    
Balance at end of year (1,160)    
Accumulated deferred gains (losses) on cash flow hedges:      
Balance at beginning of year     (549)
Derivative fair value adjustment, net of tax (272)   57
Amounts reclassified from accumulated other comprehensive loss:      
Hedge de-designation, net of tax     342 [2]
Interest rate swap termination, net of tax     150
Balance at end of year $ (272)    
[1] Amount is recorded in selling, general and administrative expenses on the consolidated statements of operations.
[2] Amount is recorded in interest expense on the consolidated statements of operations.