XML 59 R40.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Securities (Reconciliation of fair value of securities) (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | $ 413,496 | $ 363,366
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 4,948 | 3,890
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (2,501) | (3,612)
Available-for-sale Securities | 415,943 | 363,644
Held to maturity Securities, Amortized Cost | 498,392 | 487,076
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 4,121 | 3,556
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (3,454) | (4,982)
Held to Maturity, Fair Value, Total | 499,059 | 485,650
Amortized Cost | 911,888 | 850,442
Gross Unrealized Gains | 9,069 | 7,446
Unrealized Losses Other | (5,955) | (8,594)
Fair Value | 915,002 | 849,294
U. S. Government Agency Securities [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 24,009 | 24,006
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 269 | 238
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Available-for-sale Securities | 24,278 | 24,244
U.S. Treasury securities |  |
Reconciliation of fair value of securities |  |
Held to maturity Securities, Amortized Cost | 1,006 | 1,007
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 46 | 47
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | 0 | 0
Held to Maturity, Fair Value, Total | 1,052 | 1,054
Agency mortgage-backed securities |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 189,780 | 173,268
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 3,065 | 2,852
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (175) | (736)
Available-for-sale Securities | 192,670 | 175,384
Held to maturity Securities, Amortized Cost | 178,358 | 156,088
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 2,506 | 2,274
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (416) | (858)
Held to Maturity, Fair Value, Total | 180,448 | 157,504
Agency Collateralized Mortgage Obligations [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 121,292 | 101,094
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 433 | 106
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (1,028) | (1,332)
Available-for-sale Securities | 120,697 | 99,868
Held to maturity Securities, Amortized Cost | 288,428 | 297,445
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 1,285 | 1,002
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (2,881) | (3,797)
Held to Maturity, Fair Value, Total | 286,832 | 294,650
State, County, and Municipal Securities [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 3,723 | 3,743
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 52 | 50
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Available-for-sale Securities | 3,775 | 3,793
Single Issuer Trust Preferred Securities Issued by Banks and Insurers [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 2,285 | 2,311
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 43 | 3
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | (3)
Available-for-sale Securities | 2,328 | 2,311
Held to maturity Securities, Amortized Cost | 1,500 | 1,500
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 37 | 44
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | 0 | 0
Held to Maturity, Fair Value, Total | 1,537 | 1,544
Pooled trust preferred securities issued by banks and insurers |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 2,202 | 2,200
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 0 | 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (609) | (616)
Available-for-sale Securities | 1,593 | 1,584
Small Business Administration Pooled Securities [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 51,044 | 37,561
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 0 | 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (265) | (372)
Available-for-sale Securities | 50,779 | 37,189
Held to maturity Securities, Amortized Cost | 29,100 | 31,036
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 247 | 189
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (157) | (327)
Held to Maturity, Fair Value, Total | 29,190 | 30,898
Equity securities |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 19,161 | 19,183
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 1,086 | 641
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (424) | (553)
Available-for-sale Securities | $ 19,823 | $ 19,271

X
- Definition Available for sale securities and held to maturity securities amortized cost. + References No definition available. + Details
Name: | indb_AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesAmortizedCost
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Available for sale securities and held to maturity securities gross unrealized gains. + References No definition available. + Details
Name: | indb_AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesGrossUnrealizedGains
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Available for sale securities and held to maturity securities gross unrealized losses. + References No definition available. + Details
Name: | indb_AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesGrossUnrealizedLosses
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562 + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of debt and equity financial instruments classified as either held-to-maturity or available-for-sale. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesAndHeldToMaturitySecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of accumulated unrealized gain on investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity. + References No definition available. + Details
Name: | us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_DebtSecurityAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtSecurityAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtSecurityAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtSecurityAxis=us-gaap_CollateralizedDebtObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtSecurityAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtSecurityAxis=us-gaap_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtSecurityAxis=indb_PooledTrustPreferredSecuritiesIssuedByBanksAndInsurersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtSecurityAxis=indb_SmallBusinessAdministrationPooledSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtSecurityAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |