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Restructuring - Schedule of Company's Restructuring Activity (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Restructuring and Related Activities [Abstract]        
Balance at December 31     $ 92  
Charged to expense $ 562 $ 1,223 1,569 $ 1,970
Payments     (1,052) (1,580)
Balance at September 30 $ 609 $ 390 $ 609 $ 390