Business, Basis of Presentation and Significant Accounting Policies - Summary of Consolidated Statement of Operations Line Items, which Reflect Adoption of New Revenue Recognition Guidance (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Net sales $ 199,685 $ 166,685 $ 365,504 $ 328,395
Cost of sales 145,831 120,023 267,069 240,163
Gross profit 53,854 46,662 98,435 88,232
Operating income 13,914 9,742 21,293 16,109
Income (loss) before income tax expenses (19,984) (7,521) (16,231) 37,070
Net income (loss) $ (21,505) $ (8,059) $ (18,742) $ 35,679
Earnings (loss) per common share-        
Basic $ (0.62) $ (0.24) $ (0.55) $ 1.06
Diluted $ (0.62) $ (0.24) $ (0.55) $ 0.87
Adjustments [Member] | Accounting Standards Update 2014-09 [Member]        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Net sales $ (1,526)   $ (887)  
Cost of sales (2,070)   (2,010)  
Gross profit 544   1,123  
Operating income 544   1,123  
Income (loss) before income tax expenses 544   1,123  
Net income (loss) $ 544   $ 1,123  
Earnings (loss) per common share-        
Basic $ 0.02   $ 0.03  
Diluted $ 0.02   $ 0.03  
Amounts Without Adoption of the New Revenue Standard [Member] | Accounting Standards Update 2014-09 [Member]        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Net sales $ 201,211   $ 366,391  
Cost of sales 147,901   269,079  
Gross profit 53,310   97,312  
Operating income 13,370   20,170  
Income (loss) before income tax expenses (20,528)   (17,354)  
Net income (loss) $ (22,049)   $ (19,865)  
Earnings (loss) per common share-        
Basic $ (0.64)   $ (0.58)  
Diluted $ (0.64)   $ (0.58)