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Beginning Balance, Annual Activity and Ending Balance of each Component of Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accumulated Other Comprehensive Income Loss [Line Items]      
Balance $ 268,326 $ 261,003 $ 257,795
Balance 282,357 268,326 261,003
Interest Rate Swap      
Accumulated Other Comprehensive Income Loss [Line Items]      
Balance 0 0 (340)
Other comprehensive loss before reclassifications     (30)
Amounts reclassified from AOCI     594
Tax effect     (224)
Balance 0 0 0
FX Translation      
Accumulated Other Comprehensive Income Loss [Line Items]      
Balance (3,541) (1,970) (708)
Other comprehensive loss before reclassifications (1,310) (1,571) (1,262)
Balance (4,851) (3,541) (1,970)
Accumulated Other Comprehensive Income/(loss)      
Accumulated Other Comprehensive Income Loss [Line Items]      
Balance (3,541) (1,970) (1,048)
Other comprehensive loss before reclassifications (1,310) (1,571) (1,292)
Amounts reclassified from AOCI     594
Tax effect     (224)
Balance $ (4,851) $ (3,541) $ (1,970)