XML 147 R129.htm IDEA: XBRL DOCUMENT
v3.20.4

Income Taxes - Additional Information (Details) - USD ($) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Sep. 01, 2018 | Jul. 31, 2015
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Effective tax rate | 19.40% | 22.30% |  |  |
Operating loss carryforwards allowance | $ 0 |  |  |  |
Accrued interest and penalties related to unrecognized tax benefits | 18,000 | $ 105,000 | $ 244,000 |  |
Federal |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards | 3,029,000 | 36,006,000 |  |  |
State |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards | 26,971,000 | $ 40,806,000 |  |  |
Brand Group Holdings, Inc. | Federal |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  |  |  | $ 81,288,000 |
Operating loss carryforwards, not subject to expiration | 24,622,000 |  |  |  |
Brand Group Holdings, Inc. | State |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  |  |  | $ 55,067,000 |
Heritage Financial Group | Federal |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards | 3,029,000 |  |  |  | $ 18,321,000
Heritage Financial Group | State |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards | $ 2,205,000 |  |  |  | $ 16,849,000

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are not subject to expiration dates. + References No definition available. + Details
Name: | us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
Name: | us-gaap_EffectiveIncomeTaxRateContinuingOperations
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwards
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_OperatingLossCarryforwardsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
Name: | us-gaap_OperatingLossCarryforwardsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_DomesticCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_StateAndLocalJurisdictionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=rnst_BrandGroupHoldingsInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=rnst_HeritageFinancialGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |