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Prior Periods Financial Statement Revision - Schedule of Correction of Misstatements and Revision on Consolidated Statements of Operations (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Accounting Changes And Error Corrections [Line Items]    
Cost of sales (exclusive of depreciation and amortization) $ 126,444 $ 114,480
Selling, general and administrative expense 22,177 16,641
Depreciation and amortization 14,281 12,571
Income from operations 3,693 13,852
Income (loss) from continuing operations before provision (benefit) for income taxes and share of net income from joint venture (7,990) (177)
Benefit (provision) for income taxes 1,176 377
Income from continuing operations (5,983) 1,893
Income from discontinued operations, net of tax   5,518
Net income (5,983) 7,411
Other comprehensive income:    
Foreign currency translation income 5,465 5,105
Other comprehensive income (loss): 5,465 5,105
Comprehensive income (loss) $ (518) $ 12,516
Basic net income (loss) per share $ (0.22) $ 0.27
Diluted net income (loss) per share $ (0.22) $ 0.27
As Previously Reported [Member]    
Accounting Changes And Error Corrections [Line Items]    
Cost of sales (exclusive of depreciation and amortization)   $ 166,954
Selling, general and administrative expense   21,494
Depreciation and amortization   15,568
Income from operations   22,158
Income (loss) from continuing operations before provision (benefit) for income taxes and share of net income from joint venture   8,014
Benefit (provision) for income taxes   (2,300)
Income from continuing operations   7,407
Net income   7,407
Other comprehensive income:    
Foreign currency translation income   4,706
Other comprehensive income (loss):   4,706
Comprehensive income (loss)   $ 12,113
Basic net income (loss) per share   $ 0.27
Diluted net income (loss) per share   $ 0.27
Adjustment [Member]    
Accounting Changes And Error Corrections [Line Items]    
Cost of sales (exclusive of depreciation and amortization)   $ 485
Selling, general and administrative expense   (500)
Depreciation and amortization   12
Income from operations   3
Income (loss) from continuing operations before provision (benefit) for income taxes and share of net income from joint venture   3
Benefit (provision) for income taxes   1
Income from continuing operations   4
Net income   4
Other comprehensive income:    
Foreign currency translation income   399
Other comprehensive income (loss):   399
Comprehensive income (loss)   $ 403
Basic net income (loss) per share   $ 0.00
Diluted net income (loss) per share   $ 0.00
Discontinued Operations [Member]    
Accounting Changes And Error Corrections [Line Items]    
Cost of sales (exclusive of depreciation and amortization)   $ (52,959)
Selling, general and administrative expense   (4,353)
Depreciation and amortization   (3,009)
Income from operations   (8,309)
Income (loss) from continuing operations before provision (benefit) for income taxes and share of net income from joint venture   (8,194)
Benefit (provision) for income taxes   2,676
Income from continuing operations   (5,518)
Income from discontinued operations, net of tax   5,518
Continuing Operations As Revised [Member]    
Accounting Changes And Error Corrections [Line Items]    
Cost of sales (exclusive of depreciation and amortization)   114,480
Selling, general and administrative expense   16,641
Depreciation and amortization   12,571
Income from operations   13,852
Income (loss) from continuing operations before provision (benefit) for income taxes and share of net income from joint venture   (177)
Benefit (provision) for income taxes   377
Income from continuing operations   1,893
Income from discontinued operations, net of tax   5,518
Net income   7,411
Other comprehensive income:    
Foreign currency translation income   5,105
Other comprehensive income (loss):   5,105
Comprehensive income (loss)   $ 12,516
Basic net income (loss) per share   $ 0.27
Diluted net income (loss) per share   $ 0.27