XML 62 R84.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Purchased Loans - Deteriorated Loans (Details) - Purchased - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded Investment With Allowance | $ 8,228 | $ 4,869 |
Recorded Investment With No Allowance | 5,644 | 3,961 |
Total Recorded Investment | 13,872 | 8,830 |
Unpaid Principal Balance With Allowance | 8,605 | 5,001 |
Unpaid Principal Balance With No Allowance | 6,457 | 4,579 |
Total Unpaid Principal Balance | 15,062 | 9,580 |
With Related Allowance | 253 | 537 |
With No Related Allowance | 0 | 0 |
Related Allowance | 253 | 537 |
Average Recorded Investment With Related Allowance | 8,113 | 4,810 |
Average Recorded Investment With No Related Allowance | 6,038 | 4,586 |
Average recorded investment in impaired loans | 14,151 | 9,396 | $ 7,687
Interest Income Recognized With Related Allowance | 92 | 75 |
Interest Income Recognized With No Related Allowance | 80 | 119 |
Interest Income, Total | 172 | 194 |
Receivables Acquired with Deteriorated Credit Quality |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded Investment With Allowance | 66,897 | 78,611 |
Recorded Investment With No Allowance | 105,367 | 143,643 |
Total Recorded Investment | 172,264 | 222,254 |
Unpaid Principal Balance With Allowance | 73,399 | 82,605 |
Unpaid Principal Balance With No Allowance | 144,954 | 189,611 |
Total Unpaid Principal Balance | 218,353 | 272,216 |
With Related Allowance | 1,971 | 2,552 |
With No Related Allowance | 0 | 0 |
Related Allowance | 1,971 | 2,552 |
Average Recorded Investment With Related Allowance | 72,825 | 83,601 |
Average Recorded Investment With No Related Allowance | 121,658 | 129,366 |
Average recorded investment in impaired loans | 194,483 | 212,967 | 253,172
Interest Income Recognized With Related Allowance | 3,649 | 4,081 |
Interest Income Recognized With No Related Allowance | 6,729 | 6,003 | $ 12,869
Interest Income, Total | 10,378 | 10,084 |
Commercial, financial, agricultural |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded Investment With Allowance | 1,837 | 600 |
Recorded Investment With No Allowance | 901 | 11 |
Unpaid Principal Balance With Allowance | 2,074 | 658 |
Unpaid Principal Balance With No Allowance | 905 | 13 |
With Related Allowance | 212 | 173 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 1,700 | 614 |
Average Recorded Investment With No Related Allowance | 912 | 13 |
Interest Income Recognized With Related Allowance | 8 | 10 |
Interest Income Recognized With No Related Allowance | 0 | 1 |
Commercial, financial, agricultural | Receivables Acquired with Deteriorated Credit Quality |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded Investment With Allowance | 3,695 | 3,779 |
Recorded Investment With No Allowance | 25,843 | 25,364 |
Unpaid Principal Balance With Allowance | 7,370 | 4,071 |
Unpaid Principal Balance With No Allowance | 41,792 | 40,332 |
With Related Allowance | 292 | 161 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 6,919 | 4,276 |
Average Recorded Investment With No Related Allowance | 37,535 | 12,102 |
Interest Income Recognized With Related Allowance | 187 | 204 |
Interest Income Recognized With No Related Allowance | 1,208 | 669 |
Lease financing |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded Investment With Allowance | 0 | 0 |
Recorded Investment With No Allowance | 0 | 0 |
Unpaid Principal Balance With Allowance | 0 | 0 |
Unpaid Principal Balance With No Allowance | 0 | 0 |
With Related Allowance | 0 | 0 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 0 | 0 |
Average Recorded Investment With No Related Allowance | 0 | 0 |
Interest Income Recognized With Related Allowance | 0 | 0 |
Interest Income Recognized With No Related Allowance | 0 | 0 |
Lease financing | Receivables Acquired with Deteriorated Credit Quality |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded Investment With Allowance | 0 | 0 |
Recorded Investment With No Allowance | 0 | 0 |
Unpaid Principal Balance With Allowance | 0 | 0 |
Unpaid Principal Balance With No Allowance | 0 | 0 |
With Related Allowance | 0 | 0 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 0 | 0 |
Average Recorded Investment With No Related Allowance | 0 | 0 |
Interest Income Recognized With Related Allowance | 0 | 0 |
Interest Income Recognized With No Related Allowance | 0 | 0 |
Real estate – construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded Investment With Allowance | 2,499 | 576 |
Recorded Investment With No Allowance | 772 | 0 |
Unpaid Principal Balance With Allowance | 2,490 | 576 |
Unpaid Principal Balance With No Allowance | 779 | 0 |
With Related Allowance | 16 | 5 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 2,386 | 576 |
Average Recorded Investment With No Related Allowance | 770 | 0 |
Interest Income Recognized With Related Allowance | 3 | 6 |
Interest Income Recognized With No Related Allowance | 0 | 0 |
Real estate – construction | Receivables Acquired with Deteriorated Credit Quality |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded Investment With Allowance | 0 | 0 |
Recorded Investment With No Allowance | 863 | 0 |
Unpaid Principal Balance With Allowance | 0 | 0 |
Unpaid Principal Balance With No Allowance | 882 | 0 |
With Related Allowance | 0 | 0 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 0 | 0 |
Average Recorded Investment With No Related Allowance | 618 | 0 |
Interest Income Recognized With Related Allowance | 0 | 0 |
Interest Income Recognized With No Related Allowance | 21 | 0 |
Real estate – 1-4 family mortgage |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded Investment With Allowance | 2,801 | 1,381 |
Recorded Investment With No Allowance | 3,772 | 3,780 |
Unpaid Principal Balance With Allowance | 2,914 | 1,404 |
Unpaid Principal Balance With No Allowance | 4,550 | 4,383 |
With Related Allowance | 17 | 18 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 2,900 | 1,362 |
Average Recorded Investment With No Related Allowance | 4,134 | 4,407 |
Interest Income Recognized With Related Allowance | 41 | 18 |
Interest Income Recognized With No Related Allowance | 73 | 111 |
Real estate – 1-4 family mortgage | Receivables Acquired with Deteriorated Credit Quality |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded Investment With Allowance | 10,061 | 12,169 |
Recorded Investment With No Allowance | 25,482 | 36,074 |
Unpaid Principal Balance With Allowance | 10,372 | 12,601 |
Unpaid Principal Balance With No Allowance | 32,597 | 41,222 |
With Related Allowance | 291 | 488 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 10,369 | 12,894 |
Average Recorded Investment With No Related Allowance | 26,687 | 36,801 |
Interest Income Recognized With Related Allowance | 529 | 647 |
Interest Income Recognized With No Related Allowance | 1,665 | 1,647 |
Real estate – commercial mortgage |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded Investment With Allowance | 981 | 2,066 |
Recorded Investment With No Allowance | 128 | 146 |
Unpaid Principal Balance With Allowance | 1,017 | 2,116 |
Unpaid Principal Balance With No Allowance | 131 | 150 |
With Related Allowance | 6 | 338 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 1,031 | 2,011 |
Average Recorded Investment With No Related Allowance | 137 | 159 |
Interest Income Recognized With Related Allowance | 40 | 40 |
Interest Income Recognized With No Related Allowance | 7 | 7 |
Real estate – commercial mortgage | Receivables Acquired with Deteriorated Credit Quality |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded Investment With Allowance | 52,501 | 62,003 |
Recorded Investment With No Allowance | 50,632 | 78,435 |
Unpaid Principal Balance With Allowance | 55,017 | 65,273 |
Unpaid Principal Balance With No Allowance | 64,912 | 100,427 |
With Related Allowance | 1,386 | 1,901 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 54,885 | 65,756 |
Average Recorded Investment With No Related Allowance | 53,586 | 78,368 |
Interest Income Recognized With Related Allowance | 2,904 | 3,201 |
Interest Income Recognized With No Related Allowance | 3,500 | 3,578 |
Installment loans to individuals |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded Investment With Allowance | 110 | 246 |
Recorded Investment With No Allowance | 71 | 24 |
Unpaid Principal Balance With Allowance | 110 | 247 |
Unpaid Principal Balance With No Allowance | 92 | 33 |
With Related Allowance | 2 | 3 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 96 | 247 |
Average Recorded Investment With No Related Allowance | 85 | 7 |
Interest Income Recognized With Related Allowance | 0 | 1 |
Interest Income Recognized With No Related Allowance | 0 | 0 |
Installment loans to individuals | Receivables Acquired with Deteriorated Credit Quality |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Recorded Investment With Allowance | 640 | 660 |
Recorded Investment With No Allowance | 2,547 | 3,770 |
Unpaid Principal Balance With Allowance | 640 | 660 |
Unpaid Principal Balance With No Allowance | 4,771 | 7,630 |
With Related Allowance | 2 | 2 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 652 | 675 |
Average Recorded Investment With No Related Allowance | 3,232 | 2,095 |
Interest Income Recognized With Related Allowance | 29 | 29 |
Interest Income Recognized With No Related Allowance | $ 335 | $ 109 |

X
- Definition Impaired financing receivable with no related allowance. + References No definition available. + Details
Name: | rnst_ImpairedFinancingReceivableWithNoRelatedAllowance
Namespace Prefix: | rnst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Impaired financing receivable with related allowance. + References No definition available. + Details
Name: | rnst_ImpairedFinancingReceivableWithRelatedAllowance
Namespace Prefix: | rnst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5258-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableInterestIncomeCashBasisMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953550-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableRelatedAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5258-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of interest income, recognized on cash basis, on financing receivables, for which there is no related allowance for credit losses and are recognized as impaired. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of investment in impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953550-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5258-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of interest income on financing receivables, for which there is a related allowance for credit losses, recognized on a cash-basis method of accounting that the financing receivables were impaired. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of investment in impaired financing receivables for which there is a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953550-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_CreditLossStatusAxis=us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rnst_LeaseFinancingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rnst_RealEstateOneToFourFamilyMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rnst_CommercialResidentialMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rnst_InstallmentLoansToIndividualsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |