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INCOME TAXES - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Income Tax Disclosure [Abstract] |  |  |  |  |
Income tax expense (benefit) | $ (14,900,000) | $ 18,300,000 | $ (15,800,000) | $ 31,500,000 |
Effective tax rate | 570.30% | 40.80% | (115.90%) | 40.60% |
Tax credit | $ 15,700,000 |  | $ 24,500,000 |  |
Valuation allowance | 0 |  | 0 |  | $ 0
Net deferred tax asset | 9,500,000 |  | 9,500,000 |  | 10,000,000
Valuation Allowance [Line Items] |  |  |  |  |
Unrecognized tax benefits | 0 |  | 0 |  | 0
Accrued interest or penalties | $ 0 |  | 0 |  | $ 0
Excess benefit from stock based compensation |  |  | 1,100,000 |  |
Unrealized gain on securities available-for-sale |  |  |  |  |
Valuation Allowance [Line Items] |  |  |  |  |
Increase (decrease) in deferred tax asset |  |  | 12,800,000 |  |
Reversal of bonus accrual |  |  |  |  |
Valuation Allowance [Line Items] |  |  |  |  |
Increase (decrease) in deferred tax asset |  |  | (7,200,000) |  |
Sale of discontinued operations |  |  |  |  |
Valuation Allowance [Line Items] |  |  |  |  |
Increase (decrease) in deferred tax asset |  |  | $ 19,500,000 |  |

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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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