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Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax [Line Items]
Pretax income (loss) from continuing operations		$ 93,022,000	$ 74,352,000	$ 36,250,000
Recognition of an excess tax benefit and deficiency		$ 1,200,000	$ 1,000,000.0
Effective tax rate impact associated with stock-based compensation		1.30%	1.40%	(3.20%)
Decrease in effective tax rate due to settlement of a state income tax audit, percentage		(0.50%)	0.10%	(4.60%)
Effective income tax rate, deductible amount	$ 29,700,000
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%	21.00%	35.00%
Effective tax rate increased				145.30%
Increase in tax expense (benefit) due to revaluation				$ 52,700,000
Unrecognized tax benefits that would impact effective tax rate	9,300,000	$ 9,300,000	$ 8,600,000
Short-term reserves	1,000,000.0	1,000,000.0
Long-term reserves	8,900,000	8,900,000
Interest and penalties	1,900,000	$ 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	$ 0
Gross unrecognized tax benefits change range, maximum	1,500,000	1,500,000
Deferred tax asset, gross	334,900,000	334,900,000	382,800,000
Deferred tax liability, gross	56,800,000	56,800,000	4,900,000
Illinois edge gross credits not be used to offset state income tax prior to expiration		1,800,000
Net deferred income tax assets	45,000,000.0	45,000,000.0	48,000,000.0
Reduction in valuation allowance		1,400,000	800,000
Domestic Country [Member]
Income Tax [Line Items]
Net operating loss carry forwards	108,500,000	108,500,000
Foreign Country [Member]
Income Tax [Line Items]
Foreign tax credits	33,000,000.0	33,000,000.0
State [Member]
Income Tax [Line Items]
Net operating loss carry forwards	380,800,000	380,800,000
Combined State [Member]
Income Tax [Line Items]
Net operating loss carry forwards	19,000,000.0	19,000,000.0
Separate State [Member]
Income Tax [Line Items]
Net operating loss carry forwards	$ 178,700,000	178,700,000
Maximum [Member]
Income Tax [Line Items]
Unrecognized tax benefit, income tax penalties and interest (benefit)/expense recognized		$ (100,000)	$ (100,000)	200,000
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		2035
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		2020
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%
Florida [Member]
Income Tax [Line Items]
Net benefit associated with results of state income tax audit		$ 500,000
Decrease in effective tax rate due to settlement of a state income tax audit, percentage		0.50%
Illinois [Member]
Income Tax [Line Items]
Decrease in effective tax rate due to settlement of a state income tax audit, percentage				(4.60%)
Increase in tax expense (benefit) due to revaluation				$ (1,700,000)
Illinois [Member] | Maximum [Member]
Income Tax [Line Items]
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- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

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