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Income Taxes - Reconciliation of Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |
Tax at statutory rate | 35.00% | 35.00% | 35.00%
State taxes, net of federal benefit | 4.00% | 3.00% | 2.00%
Uncertain tax positions | 0.00% | (22.00%) | 0.00%
IRS audit resolution | 0.00% | 11.00% | 0.00%
Effect of net income attributable to noncontrolling interests | 2.00% | 0.00% | 0.00%
Change in valuation allowance | 12.00% | 2.00% | 0.00%
Other, net | 2.00% | 0.00% | 0.00%
Income tax expense | 55.00% | 29.00% | 37.00%
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Tax at statutory rate | $ 23,675 | $ 47,922 | $ 41,968
State taxes, net of federal benefit | 2,717 | 4,357 | 2,893
Uncertain tax positions | 0 | (30,961) | 0
IRS audit resolution | 0 | 15,505 | 0
Effect of net income attributable to noncontrolling interests | 1,492 | 0 | 0
Change in valuation allowance | 7,812 | 2,165 | (264)
Other, net | 1,276 | 361 | 181
Income tax expense | $ 36,972 | $ 39,349 | $ 44,778

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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