Income Taxes - Reconciliation Between Statutory Federal Income Tax Rate and Effective Income Tax (Detail)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation [Abstract]
Federal statutory tax rate	21.00%	21.00%	35.00%
Federal rate change	0.00%	0.00%	(406.70%)
State	3.80%	(0.30%)	(0.70%)
State rate and law change	1.80%	0.90%	(1.30%)
Non-deductible executive compensation	0.00%	0.00%	0.70%
Valuation allowances	(3.80%)	(0.40%)	36.80%
Equity compensation	(0.20%)	(0.10%)	30.20%
Goodwill impairment	0.00%	(19.40%)	0.00%
Other	0.00%	0.00%	0.30%
Consolidated effective tax rate	22.60%	1.70%	(305.70%)

Effective income tax rate reconciliation nondeductible equity compensation in excess of additional paid in capital.

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Effective income tax rate reconciliation state rate and law change.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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