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v2.4.1.9

Deferred Tax Assets and Deferred Tax Liabilities (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Deferred tax assets |  |
Allowance for loan and lease losses | $ 50,013us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses | $ 50,652us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses
Other real estate owned | 8,200gbci_DeferredTaxAssetsOtherRealEstateOwned | 8,041gbci_DeferredTaxAssetsOtherRealEstateOwned
Interest rate swap agreements | 6,467us-gaap_DeferredTaxAssetsDerivativeInstruments | 0us-gaap_DeferredTaxAssetsDerivativeInstruments
Acquisition fair market value adjustments | 5,302gbci_DeferredTaxAssetsFairMarketValueAdjustmentsfromAcquisitions | 4,151gbci_DeferredTaxAssetsFairMarketValueAdjustmentsfromAcquisitions
Deferred compensation | 5,024us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation | 4,837us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation
Income tax credits and net operating loss carryforwards | 4,652us-gaap_DeferredTaxAssetsOtherTaxCarryforwards | 2,778us-gaap_DeferredTaxAssetsOtherTaxCarryforwards
Employee benefits | 2,839us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits | 3,132us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits
Other | 4,290us-gaap_DeferredTaxAssetsOther | 3,662us-gaap_DeferredTaxAssetsOther
Total gross deferred tax assets | 86,787us-gaap_DeferredTaxAssetsGross | 77,253us-gaap_DeferredTaxAssetsGross
Deferred tax liabilities |  |
Available-for-sale securities | (17,716)us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome | (5,402)us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome
FHLB stock dividends | (10,342)gbci_DeferredTaxLiabilitiesStockDividends | (10,359)gbci_DeferredTaxLiabilitiesStockDividends
Deferred loan costs | (6,419)us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts | (6,058)us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts
Intangibles | (4,290)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets | (3,099)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets
Depreciation of premises and equipment | (2,358)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | (3,939)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Interest rate swap agreements | 0us-gaap_DeferredTaxLiabilitiesDerivatives | (736)us-gaap_DeferredTaxLiabilitiesDerivatives
Other | (3,925)us-gaap_DeferredTaxLiabilitiesOther | (4,111)us-gaap_DeferredTaxLiabilitiesOther
Total gross deferred tax liabilities | (45,050)us-gaap_DeferredIncomeTaxLiabilities | (33,704)us-gaap_DeferredIncomeTaxLiabilities
Net deferred tax asset | $ 41,737us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 43,549us-gaap_DeferredTaxAssetsLiabilitiesNet

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- Definition Amount of deferred tax liability attributable to taxable temporary differences from deferred financing costs. + References Reference 1: 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=6907707&loc=d3e32621-109319 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=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. + References Reference 1: 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=6907707&loc=d3e32621-109319 Reference 2: 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=29652012&loc=d3e28680-109314 Reference 3: 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=6907707&loc=d3e32632-109319 + Details
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