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Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax [Line Items]      
Pretax loss from continuing operations $ 31,366,000 $ 94,438,000 $ 138,826,000
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    
Percentage of benefit due to valuation allowance release   116.30%  
Valuation allowance release, amount   $ 109,800,000  
Decrease in effective tax rate due to valuation allowance, percentage 0.50% 0.60% 37.00%
Decrease in effective tax rate due to valuation allowance, amount     $ 51,600,000
Impact of effective tax rate due to settlement of a federal income tax audit, percentage (6.70%)   2.40%
Unrecognized tax benefits that would impact effective tax rate $ 6,600,000 $ 6,400,000  
Short-term reserves 1,200,000    
Long-term reserves 6,900,000    
Interest and penalties $ 2,008,000 1,986,000 $ 2,820,000
Significant change in unrecognized tax benefits, nature of event description Due to the potential for resolution of state examinations, and the expiration of various statutes of limitations    
Gross unrecognized tax benefits change range, minimum $ 0    
Gross unrecognized tax benefits change range, maximum 1,800,000    
Deferred tax asset, gross 486,200,000 426,200,000  
Deferred tax liability, gross 8,900,000 7,700,000  
Illinois edge gross credits available to offset future state income tax 6,700,000    
Net deferred income tax assets 49,700,000 47,500,000  
Domestic Country [Member]      
Income Tax [Line Items]      
Net operating loss carry forwards 158,100,000    
Foreign Country [Member]      
Income Tax [Line Items]      
Foreign tax credits 33,000,000    
State and Local Jurisdiction [Member]      
Income Tax [Line Items]      
Net operating loss carry forwards 411,400,000    
Separate State [Member]      
Income Tax [Line Items]      
Net operating loss carry forwards 248,200,000    
Maximum [Member]      
Income Tax [Line Items]      
Unrecognized tax benefits, income tax penalties and interest benefit/expense recognized $ 100,000 $ 700,000 $ 100,000
Maximum [Member] | Illinois [Member]      
Income Tax [Line Items]      
Edge credits expiration year 2019    
Maximum [Member] | Domestic Country [Member]      
Income Tax [Line Items]      
Net operating loss carry forwards, expiration year 2036    
Maximum [Member] | Foreign Country [Member]      
Income Tax [Line Items]      
Foreign tax credits, expiration year 2023    
Maximum [Member] | State and Local Jurisdiction [Member]      
Income Tax [Line Items]      
Net operating loss carry forwards, expiration year 2036    
Minimum [Member] | Illinois [Member]      
Income Tax [Line Items]      
Edge credits expiration year 2017    
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 and Local Jurisdiction [Member]      
Income Tax [Line Items]      
Net operating loss carry forwards, expiration year 2017