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Income Taxes - Additional Information (Detail) - USD ($) | 1 Months Ended | 11 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2015 | Nov. 30, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Tax Disclosure [Line Items] |  |  |  |  |
Effect of federal tax law change | $ 5,200,000 |  |  | $ 5,229,000 |
Built-in-gains recognition period | 5 years | 10 years |  |  |
U.S. federal statutory rate |  |  | 35.00% |  |
Deferred tax benefit | $ 153,464,000 |  | $ 157,150,000 | 153,464,000 |
Charitable contribution carryforwards |  |  | 2,200,000 |  |
State net operating loss carryforwards |  |  | 431,300,000 |  |
Unrecognized tax benefits | 0 |  | 0 | 0 |
Income tax penalties accrued related to uncertain tax positions | 0 |  | 0 | 0 |
Interest on income taxes accrued related to uncertain tax positions | $ 0 |  | 0 | 0 |
Charitable Contributions [Member] |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |
Deferred tax benefit |  |  | $ 800,000 |  |
Operating loss carryforwards expire date |  |  | 2017 |  |
Federal [Member] |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |
Federal net operating loss carryforwards |  |  | $ 83,800,000 |  |
Deferred tax benefit |  |  | $ 29,300,000 |  |
Operating loss carryforwards expire date |  |  | 2033 |  |
Valuation allowances related to federal deferred tax assets |  |  | $ 600,000 | (8,300,000) | $ 4,300,000
State [Member] |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |
Deferred tax benefit |  |  | 22,300,000 |  |
Valuation allowances related to federal deferred tax assets |  |  | $ 200,000 | $ 1,800,000 | $ 3,500,000
State [Member] | Minimum [Member] |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |
Operating loss carryforwards expire date |  |  | 2017 |  |
State [Member] | Maximum [Member] |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |
Operating loss carryforwards expire date |  |  | 2036 |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible charitable contribution carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28680-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32621-109319 + Details
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