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Stockholders' Equity - Components of Stockholders' Equity (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Beginning Balance $ 158,088 $ 151,600
Issuance of common stock under stock plans, net 1,053 3,275
Stock-based compensation expense 2,802 2,685
Cumulative effect adjustment due to adoption of new accounting pronouncement, net of tax of $61 (157)  
Net loss (513) (13,316)
Net change in interest rate swap, net of tax of $462 (1,181)  
Foreign currency translation (1,920) (430)
Ending Balance 158,172 143,814
Common Stock [Member]    
Beginning Balance $ 233 $ 230
Beginning Balance, Shares 23,275,000 22,951,000
Issuance of common stock under stock plans, net $ 1 $ 1
Issuance of common stock under stock plans, net, Shares 114,000 99,000
Ending Balance $ 234 $ 231
Ending Balance, Shares 23,389,000 23,050,000
Additional Paid-in Capital [Member]    
Beginning Balance $ 216,454 $ 200,696
Issuance of common stock under stock plans, net 1,052 3,274
Stock-based compensation expense 2,802 2,685
Ending Balance 220,308 206,655
Retained Earnings [Member]    
Beginning Balance 118,147 127,717
Cumulative effect adjustment due to adoption of new accounting pronouncement, net of tax of $61 (157)  
Net loss (513) (13,316)
Ending Balance 117,477 114,401
Treasury Stock [Member]    
Beginning Balance $ (171,889) $ (171,889)
Beginning Balance, Shares 4,631,000 4,631,000
Ending Balance $ (171,889) $ (171,889)
Ending Balance, Shares 4,631,000 4,631,000
Accumulated Other Comprehensive Income (Loss) [Member]    
Beginning Balance $ (4,857) $ (5,154)
Net change in interest rate swap, net of tax of $462 (1,181)  
Foreign currency translation (1,920) (430)
Ending Balance $ (7,958) $ (5,584)