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INCOME TAXES (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
INCOME TAXES |  |  |  |  |  |  |  |  |  |  |
Tax credits generated from investments in affordable housing partnerships and other investments |  |  |  |  |  |  |  |  | $ 85,700,000 us-gaap_InvestmentTaxCredit | $ 35,000,000 us-gaap_InvestmentTaxCredit | $ 18,700,000 us-gaap_InvestmentTaxCredit
Net deferred tax assets | 384,367,000 us-gaap_DeferredTaxAssetsLiabilitiesNet |  |  |  | 255,530,000 us-gaap_DeferredTaxAssetsLiabilitiesNet |  |  |  | 384,367,000 us-gaap_DeferredTaxAssetsLiabilitiesNet | 255,530,000 us-gaap_DeferredTaxAssetsLiabilitiesNet |
Current income tax expense (benefit): |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | 153,211,000 us-gaap_CurrentFederalTaxExpenseBenefit | 131,236,000 us-gaap_CurrentFederalTaxExpenseBenefit | 148,572,000 us-gaap_CurrentFederalTaxExpenseBenefit
State |  |  |  |  |  |  |  |  | 70,527,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 44,389,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 2,316,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign |  |  |  |  |  |  |  |  | 3,846,000 us-gaap_CurrentForeignTaxExpenseBenefit | 208,000 us-gaap_CurrentForeignTaxExpenseBenefit | 5,704,000 us-gaap_CurrentForeignTaxExpenseBenefit
Total current income tax expense (benefit) |  |  |  |  |  |  |  |  | 227,584,000 us-gaap_CurrentIncomeTaxExpenseBenefit | 175,833,000 us-gaap_CurrentIncomeTaxExpenseBenefit | 156,592,000 us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred income tax (benefit) expense: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | (116,241,000)us-gaap_DeferredFederalIncomeTaxExpenseBenefit | (32,963,000)us-gaap_DeferredFederalIncomeTaxExpenseBenefit | (38,749,000)us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State |  |  |  |  |  |  |  |  | (37,665,000)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | (13,677,000)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 26,099,000 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Foreign |  |  |  |  |  |  |  |  | (706,000)us-gaap_DeferredForeignIncomeTaxExpenseBenefit | 1,612,000 us-gaap_DeferredForeignIncomeTaxExpenseBenefit |
Total deferred income tax (benefit) expense |  |  |  |  |  |  |  |  | (154,612,000)us-gaap_DeferredIncomeTaxExpenseBenefit | (45,028,000)us-gaap_DeferredIncomeTaxExpenseBenefit | (12,650,000)us-gaap_DeferredIncomeTaxExpenseBenefit
Provision for income taxes | $ 20,049,000 us-gaap_IncomeTaxExpenseBenefit | $ (13,644,000)us-gaap_IncomeTaxExpenseBenefit | $ 31,618,000 us-gaap_IncomeTaxExpenseBenefit | $ 34,949,000 us-gaap_IncomeTaxExpenseBenefit | $ 22,782,000 us-gaap_IncomeTaxExpenseBenefit | $ 35,749,000 us-gaap_IncomeTaxExpenseBenefit | $ 37,855,000 us-gaap_IncomeTaxExpenseBenefit | $ 34,419,000 us-gaap_IncomeTaxExpenseBenefit | $ 72,972,000 us-gaap_IncomeTaxExpenseBenefit | $ 130,805,000 us-gaap_IncomeTaxExpenseBenefit | $ 143,942,000 us-gaap_IncomeTaxExpenseBenefit
Difference between the effective tax rate implicit in the consolidated financial statements and the statutory federal income tax rate |  |  |  |  |  |  |  |  |  |  |
Federal income tax provision at statutory rate (as a percent) |  |  |  |  |  |  |  |  | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State franchise taxes, net of federal tax effect (as a percent) |  |  |  |  |  |  |  |  | 5.10%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | 4.70%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | 4.30%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Tax credits (as a percent) |  |  |  |  |  |  |  |  | (21.50%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits | (8.40%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits | (5.30%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits
Other, net (as a percent) |  |  |  |  |  |  |  |  | (1.00%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | (0.60%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | (0.20%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective income tax rate (as a percent) |  |  |  |  |  |  |  |  | 17.60%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 30.70%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 33.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition The amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; includes deferred investment tax credits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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