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Income Taxes - Additional Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax [Line Items] |  |  |  |
Pretax income (loss) from continuing operations |  | $ 36,250,000 | $ (31,366,000) | $ (94,438,000)
Statutory U.S. federal income tax rate |  | 35.00% | 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 |  | (4.60%) |  |
Worthless stock deduction, tax benefit net |  |  | $ 3,700,000 |
Worthless stock |  |  | 11.90% |
Effective rate tax adjustment related to federal tax, amount |  |  | $ 2,100,000 |
Valuation allowance release |  |  |  | 116.30%
Valuation allowance release, amount |  |  |  | $ 109,800,000
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 |  | $ 8,300,000 | $ 6,600,000 |
Short-term reserves |  | 1,400,000 |  |
Long-term reserves |  | 7,200,000 |  |
Interest and penalties |  | $ 1,900,000 | 2,000,000 |
Unrecognized tax benefits, income tax penalties and interest benefit/expense recognized |  |  |  | $ (700,000)
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 |  | 2,000,000 |  |
Deferred tax asset, gross |  | 441,000,000 | 486,200,000 |
Deferred tax liability, gross |  | 5,300,000 | 8,900,000 |
Illinois edge gross credits available to offset future state income tax |  | 3,700,000 |  |
Net deferred income tax assets |  | 50,500,000 |  |
Domestic Country [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Net operating loss carry forwards |  | 215,500,000 |  |
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 |  | 456,700,000 |  |
Combined State [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Net operating loss carry forwards |  | 33,000,000 |  |
Separate State [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Net operating loss carry forwards |  | 208,100,000 |  |
Maximum [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Unrecognized tax benefits, income tax penalties and interest benefit/expense recognized |  | $ 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 and Local Jurisdiction [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 and Local Jurisdiction [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Net operating loss carry forwards, expiration year |  | 2018 |  |
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 |  |
Illinois [Member] | Minimum [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Edge credits expiration year |  | 2018 |  |
Scenario Forecast [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Statutory U.S. federal income tax rate | 21.00% |  |  |

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