XML 59 R49.htm IDEA: XBRL DOCUMENT
v3.21.1

Loans Receivable, Net - Credit Quality Indicators for RRE and Consumer Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Credit Quality Indicators By Origination |  |
Total | $ 11,269,929 | $ 11,122,696
Residential real estate |  |
Credit Quality Indicators By Origination |  |
Term loans originated current fiscal year | 37,080 | 208,679
Term loans originated fiscal year before current fiscal year | 220,196 | 181,924
Term loans originated two years before current fiscal year | 133,625 | 100,273
Term loans originated three years before current fiscal year | 83,079 | 76,394
Term loans originated four years before current fiscal year | 65,036 | 53,819
Term loans originated five years before current fiscal year | 203,795 | 179,085
Revolving loans | 2,286 | 2,334
Total | 745,097 | 802,508
Residential real estate | Performing |  |
Credit Quality Indicators By Origination |  |
Term loans originated current fiscal year | 36,673 | 207,432
Term loans originated fiscal year before current fiscal year | 219,651 | 179,915
Term loans originated two years before current fiscal year | 133,269 | 99,135
Term loans originated three years before current fiscal year | 82,095 | 75,527
Term loans originated four years before current fiscal year | 64,227 | 52,905
Term loans originated five years before current fiscal year | 197,805 | 174,281
Revolving loans | 2,286 | 2,334
Total | 736,006 | 791,529
Residential real estate | 30-89 Days Past Due |  |
Credit Quality Indicators By Origination |  |
Term loans originated current fiscal year | 407 | 1,247
Term loans originated fiscal year before current fiscal year | 545 | 2,009
Term loans originated two years before current fiscal year | 356 | 556
Term loans originated three years before current fiscal year | 750 | 867
Term loans originated four years before current fiscal year | 809 | 87
Term loans originated five years before current fiscal year | 2,760 | 1,876
Revolving loans | 0 | 0
Total | 5,627 | 6,642
Residential real estate | Non-Accrual and 90 Days or More Past Due |  |
Credit Quality Indicators By Origination |  |
Term loans originated current fiscal year | 0 | 0
Term loans originated fiscal year before current fiscal year | 0 | 0
Term loans originated two years before current fiscal year | 0 | 582
Term loans originated three years before current fiscal year | 234 | 0
Term loans originated four years before current fiscal year | 0 | 827
Term loans originated five years before current fiscal year | 3,230 | 2,928
Revolving loans | 0 | 0
Total | 3,464 | 4,337
Home equity |  |
Credit Quality Indicators By Origination |  |
Term loans originated current fiscal year | 18 | 89
Term loans originated fiscal year before current fiscal year | 71 | 807
Term loans originated two years before current fiscal year | 672 | 1,782
Term loans originated three years before current fiscal year | 1,162 | 1,452
Term loans originated four years before current fiscal year | 1,015 | 1,016
Term loans originated five years before current fiscal year | 12,868 | 14,025
Revolving loans | 609,563 | 617,234
Total | 625,369 | 636,405
Home equity | Performing |  |
Credit Quality Indicators By Origination |  |
Term loans originated current fiscal year | 18 | 89
Term loans originated fiscal year before current fiscal year | 71 | 771
Term loans originated two years before current fiscal year | 637 | 1,782
Term loans originated three years before current fiscal year | 1,162 | 1,426
Term loans originated four years before current fiscal year | 989 | 1,016
Term loans originated five years before current fiscal year | 11,890 | 13,042
Revolving loans | 606,083 | 612,545
Total | 620,850 | 630,671
Home equity | 30-89 Days Past Due |  |
Credit Quality Indicators By Origination |  |
Term loans originated current fiscal year | 0 | 0
Term loans originated fiscal year before current fiscal year | 0 | 0
Term loans originated two years before current fiscal year | 0 | 0
Term loans originated three years before current fiscal year | 0 | 26
Term loans originated four years before current fiscal year | 0 | 0
Term loans originated five years before current fiscal year | 520 | 463
Revolving loans | 1,168 | 2,397
Total | 1,688 | 2,886
Home equity | Non-Accrual and 90 Days or More Past Due |  |
Credit Quality Indicators By Origination |  |
Term loans originated current fiscal year | 0 | 0
Term loans originated fiscal year before current fiscal year | 0 | 36
Term loans originated two years before current fiscal year | 35 | 0
Term loans originated three years before current fiscal year | 0 | 0
Term loans originated four years before current fiscal year | 26 | 0
Term loans originated five years before current fiscal year | 458 | 520
Revolving loans | 2,312 | 2,292
Total | 2,831 | 2,848
Other consumer |  |
Credit Quality Indicators By Origination |  |
Term loans originated current fiscal year | 48,670 | 131,302
Term loans originated fiscal year before current fiscal year | 114,926 | 66,327
Term loans originated two years before current fiscal year | 57,385 | 42,827
Term loans originated three years before current fiscal year | 36,830 | 16,287
Term loans originated four years before current fiscal year | 13,154 | 10,519
Term loans originated five years before current fiscal year | 25,409 | 18,692
Revolving loans | 27,804 | 27,117
Total | 324,178 | 313,071
Other consumer | Performing |  |
Credit Quality Indicators By Origination |  |
Term loans originated current fiscal year | 48,652 | 131,098
Term loans originated fiscal year before current fiscal year | 114,701 | 65,921
Term loans originated two years before current fiscal year | 56,947 | 42,557
Term loans originated three years before current fiscal year | 36,469 | 16,202
Term loans originated four years before current fiscal year | 13,093 | 10,409
Term loans originated five years before current fiscal year | 24,347 | 17,334
Revolving loans | 27,381 | 26,704
Total | 321,590 | 310,225
Other consumer | 30-89 Days Past Due |  |
Credit Quality Indicators By Origination |  |
Term loans originated current fiscal year | 0 | 158
Term loans originated fiscal year before current fiscal year | 173 | 170
Term loans originated two years before current fiscal year | 145 | 212
Term loans originated three years before current fiscal year | 168 | 38
Term loans originated four years before current fiscal year | 10 | 48
Term loans originated five years before current fiscal year | 784 | 1,155
Revolving loans | 21 | 411
Total | 1,301 | 2,192
Other consumer | Non-Accrual and 90 Days or More Past Due |  |
Credit Quality Indicators By Origination |  |
Term loans originated current fiscal year | 18 | 46
Term loans originated fiscal year before current fiscal year | 52 | 236
Term loans originated two years before current fiscal year | 293 | 58
Term loans originated three years before current fiscal year | 193 | 47
Term loans originated four years before current fiscal year | 51 | 62
Term loans originated five years before current fiscal year | 278 | 203
Revolving loans | 402 | 2
Total | $ 1,287 | $ 654

X
- Definition Amount of financing receivable originated more than five years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated four years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated in current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated in fiscal year prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated three years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated two years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of financing receivable that can be withdrawn, repaid and redrawn. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableRevolving
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, before allowance for credit loss, of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_PerformingFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentPerformanceStatusAxis=gbci_NonperformingFinancialInstruments3089DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentPerformanceStatusAxis=gbci_NonperformingFinancialInstrumentsNonAccrualAnd90DaysOrMorePastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=gbci_HomeEquityPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |