XML 123 R106.htm IDEA: XBRL DOCUMENT
v3.19.3

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Financial assets: |  |
Securities available for sale, at fair value | $ 1,238,577 | $ 1,250,777
Mortgage loans held for sale in loans held for sale | 392,448 | 219,848
Trust preferred securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 9,862 | 10,633
Other debt securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 48,249 | 43,927
Government agency mortgage backed securities | Residential mortgage backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 666,167 | 613,283
Government agency mortgage backed securities | Commercial mortgage-backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 27,666 | 21,830
Government agency collateralized mortgage obligations | Residential mortgage backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 191,187 | 326,989
Government agency collateralized mortgage obligations | Commercial mortgage-backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 75,423 | 28,335
Recurring |  |
Financial assets: |  |
Securities available for sale, at fair value | 1,238,577 | 1,250,777
Derivative instruments | 12,329 | 6,519
Mortgage loans held for sale in loans held for sale | 392,448 | 219,848
Total financial assets | 1,643,354 | 1,477,144
Financial liabilities: |  |
Derivative instruments | 12,495 | 8,388
Total financial liabilities | 12,495 | 8,388
Recurring | Interest rate contracts |  |
Financial assets: |  |
Derivative instruments | 5,055 | 2,779
Financial liabilities: |  |
Derivative instruments | 5,055 | 2,779
Recurring | Interest rate swaps |  |
Financial liabilities: |  |
Derivative instruments | 6,290 | 2,046
Recurring | Interest rate lock commitments |  |
Financial assets: |  |
Derivative instruments | 6,694 | 3,740
Financial liabilities: |  |
Derivative instruments | 14 |
Recurring | Forward commitments |  |
Financial assets: |  |
Derivative instruments | 580 |
Financial liabilities: |  |
Derivative instruments | 1,136 | 3,563
Recurring | Trust preferred securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 9,862 | 10,633
Recurring | Other debt securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 48,249 | 43,927
Recurring | U.S. Treasury securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 498 |
Recurring | Obligations of other U.S. Government agencies and corporations |  |
Financial assets: |  |
Securities available for sale, at fair value | 2,537 | 2,511
Recurring | Obligations of states and political subdivisions |  |
Financial assets: |  |
Securities available for sale, at fair value | 216,988 | 203,269
Recurring | Government agency mortgage backed securities | Residential mortgage backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 666,167 | 613,283
Recurring | Government agency mortgage backed securities | Commercial mortgage-backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 27,666 | 21,830
Recurring | Government agency collateralized mortgage obligations | Residential mortgage backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 191,187 | 326,989
Recurring | Government agency collateralized mortgage obligations | Commercial mortgage-backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 75,423 | 28,335
Recurring | Level 1 |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Derivative instruments | 0 | 0
Mortgage loans held for sale in loans held for sale | 0 | 0
Total financial assets | 0 | 0
Financial liabilities: |  |
Derivative instruments | 0 | 0
Total financial liabilities | 0 | 0
Recurring | Level 1 | Interest rate contracts |  |
Financial assets: |  |
Derivative instruments | 0 | 0
Financial liabilities: |  |
Derivative instruments | 0 | 0
Recurring | Level 1 | Interest rate swaps |  |
Financial liabilities: |  |
Derivative instruments | 0 | 0
Recurring | Level 1 | Interest rate lock commitments |  |
Financial assets: |  |
Derivative instruments | 0 | 0
Financial liabilities: |  |
Derivative instruments | 0 |
Recurring | Level 1 | Forward commitments |  |
Financial assets: |  |
Derivative instruments | 0 |
Financial liabilities: |  |
Derivative instruments | 0 | 0
Recurring | Level 1 | Trust preferred securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 1 | Other debt securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 1 | U.S. Treasury securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 |
Recurring | Level 1 | Obligations of other U.S. Government agencies and corporations |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 1 | Obligations of states and political subdivisions |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 1 | Government agency mortgage backed securities | Residential mortgage backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 1 | Government agency mortgage backed securities | Commercial mortgage-backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 1 | Government agency collateralized mortgage obligations | Residential mortgage backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 1 | Government agency collateralized mortgage obligations | Commercial mortgage-backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 2 |  |
Financial assets: |  |
Securities available for sale, at fair value | 1,228,715 | 1,240,144
Derivative instruments | 12,329 | 6,519
Mortgage loans held for sale in loans held for sale | 392,448 | 219,848
Total financial assets | 1,633,492 | 1,466,511
Financial liabilities: |  |
Derivative instruments | 12,495 | 8,388
Total financial liabilities | 12,495 | 8,388
Recurring | Level 2 | Interest rate contracts |  |
Financial assets: |  |
Derivative instruments | 5,055 | 2,779
Financial liabilities: |  |
Derivative instruments | 5,055 | 2,779
Recurring | Level 2 | Interest rate swaps |  |
Financial liabilities: |  |
Derivative instruments | 6,290 | 2,046
Recurring | Level 2 | Interest rate lock commitments |  |
Financial assets: |  |
Derivative instruments | 6,694 | 3,740
Financial liabilities: |  |
Derivative instruments | 14 |
Recurring | Level 2 | Forward commitments |  |
Financial assets: |  |
Derivative instruments | 580 |
Financial liabilities: |  |
Derivative instruments | 1,136 | 3,563
Recurring | Level 2 | Trust preferred securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 2 | Other debt securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 48,249 | 43,927
Recurring | Level 2 | U.S. Treasury securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 498 |
Recurring | Level 2 | Obligations of other U.S. Government agencies and corporations |  |
Financial assets: |  |
Securities available for sale, at fair value | 2,537 | 2,511
Recurring | Level 2 | Obligations of states and political subdivisions |  |
Financial assets: |  |
Securities available for sale, at fair value | 216,988 | 203,269
Recurring | Level 2 | Government agency mortgage backed securities | Residential mortgage backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 666,167 | 613,283
Recurring | Level 2 | Government agency mortgage backed securities | Commercial mortgage-backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 27,666 | 21,830
Recurring | Level 2 | Government agency collateralized mortgage obligations | Residential mortgage backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 191,187 | 326,989
Recurring | Level 2 | Government agency collateralized mortgage obligations | Commercial mortgage-backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 75,423 | 28,335
Recurring | Level 3 |  |
Financial assets: |  |
Securities available for sale, at fair value | 9,862 | 10,633
Derivative instruments | 0 | 0
Mortgage loans held for sale in loans held for sale | 0 | 0
Total financial assets | 9,862 | 10,633
Financial liabilities: |  |
Derivative instruments | 0 | 0
Total financial liabilities | 0 | 0
Recurring | Level 3 | Interest rate contracts |  |
Financial assets: |  |
Derivative instruments | 0 | 0
Financial liabilities: |  |
Derivative instruments | 0 | 0
Recurring | Level 3 | Interest rate swaps |  |
Financial liabilities: |  |
Derivative instruments | 0 | 0
Recurring | Level 3 | Interest rate lock commitments |  |
Financial assets: |  |
Derivative instruments | 0 | 0
Financial liabilities: |  |
Derivative instruments | 0 |
Recurring | Level 3 | Forward commitments |  |
Financial assets: |  |
Derivative instruments | 0 |
Financial liabilities: |  |
Derivative instruments | 0 | 0
Recurring | Level 3 | Trust preferred securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 9,862 | 10,633
Recurring | Level 3 | Other debt securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 3 | U.S. Treasury securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 |
Recurring | Level 3 | Obligations of other U.S. Government agencies and corporations |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 3 | Obligations of states and political subdivisions |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 3 | Government agency mortgage backed securities | Residential mortgage backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 3 | Government agency mortgage backed securities | Commercial mortgage-backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 3 | Government agency collateralized mortgage obligations | Residential mortgage backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 3 | Government agency collateralized mortgage obligations | Commercial mortgage-backed securities |  |
Financial assets: |  |
Securities available for sale, at fair value | $ 0 | $ 0

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
Name: | us-gaap_DerivativeAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 + Details
Name: | us-gaap_DerivativeLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Fair value portion of mortgage loans held-for-sale. + References No definition available. + Details
Name: | us-gaap_MortgagesHeldForSaleFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=rnst_TrustPreferredSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_OtherDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=rnst_GovernmentAgencyMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=rnst_GovernmentAgencyCollateralizedMortgageObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateLockCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForwardContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |