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Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax [Line Items]      
Pretax income (loss) from continuing operations $ 74,352,000 $ 36,250,000 $ (31,366,000)
Recognition of an excess tax benefit and deficiency $ 1,000,000    
Effective tax rate impact associated with stock-based compensation 1.40% (3.20%)  
Income tax rate non deductible legal settlement $ 1,100,000    
Effective income tax rate legal agreements 1.40%    
U.S. corporate tax rate 21.00% 35.00% 35.00%
Effective tax rate increased   145.30%  
Increase in tax expense (benefit) due to revaluation   $ 52,700,000  
Decrease in effective tax rate due to settlement of a state income tax audit, percentage 0.10% (4.60%)  
Worthless stock deduction, tax benefit net     $ 3,700,000
Decreased effective tax rate on worthless stock     11.90%
Effective rate tax adjustment related to federal tax, amount     $ 2,100,000
Decrease in effective tax rate due to settlement of a federal income tax audit, percentage     6.70%
Unrecognized tax benefits that would impact effective tax rate $ 8,600,000 $ 8,300,000  
Short-term reserves 1,000,000    
Long-term reserves 8,000,000    
Interest and penalties $ 1,900,000 1,900,000  
Significant change in unrecognized tax benefits, nature of event description Due to the expiration of various statutes of limitations    
Gross unrecognized tax benefits change range, minimum $ 0    
Gross unrecognized tax benefits change range, maximum 1,600,000    
Deferred tax asset, gross 382,800,000 457,900,000  
Deferred tax liability, gross 4,900,000 5,300,000  
Illinois edge gross credits available to offset future state income tax 1,800,000    
Net deferred income tax assets 48,000,000 50,500,000  
Domestic Country [Member]      
Income Tax [Line Items]      
Net operating loss carry forwards 193,600,000    
Foreign Country [Member]      
Income Tax [Line Items]      
Foreign tax credits 33,000,000    
State [Member]      
Income Tax [Line Items]      
Net operating loss carry forwards 437,100,000    
Combined State [Member]      
Income Tax [Line Items]      
Net operating loss carry forwards 38,800,000    
Separate State [Member]      
Income Tax [Line Items]      
Net operating loss carry forwards 193,400,000    
Maximum [Member]      
Income Tax [Line Items]      
Unrecognized tax benefits, income tax penalties and interest benefit/expense recognized $ (100,000) 200,000 $ (100,000)
Maximum [Member] | Domestic Country [Member]      
Income Tax [Line Items]      
Net operating loss carry forwards, expiration year 2037    
Maximum [Member] | Foreign Country [Member]      
Income Tax [Line Items]      
Foreign tax credits, expiration year 2023    
Maximum [Member] | State [Member]      
Income Tax [Line Items]      
Net operating loss carry forwards, expiration year 2037    
Minimum [Member] | Domestic Country [Member]      
Income Tax [Line Items]      
Net operating loss carry forwards, expiration year 2034    
Minimum [Member] | Foreign Country [Member]      
Income Tax [Line Items]      
Foreign tax credits, expiration year 2022    
Minimum [Member] | State [Member]      
Income Tax [Line Items]      
Net operating loss carry forwards, expiration year 2019    
ASU 2016-09 [Member]      
Income Tax [Line Items]      
Recognition of an excess tax benefit and deficiency   $ 1,100,000  
Increase in annual effective tax rate due to recognition of an excess tax benefit and deficiency   3.20%  
Illinois [Member]      
Income Tax [Line Items]      
Increase in tax expense (benefit) due to revaluation   $ 1,700,000  
Decrease in effective tax rate due to settlement of a state income tax audit, percentage   (4.60%)  
Illinois [Member] | Maximum [Member]      
Income Tax [Line Items]      
Edge credits expiration year 2019