XML 84 R72.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Purchased Loans (Details Textual) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) loan | Jun. 30, 2016 USD ($) loan | Dec. 31, 2016 USD ($)
Loans and Allowance for Loan Losses (Textual) [Abstract] |  |  |  |  |
Allowance for loan losses attributable to restructured loans | $ 44,149,000 |  | $ 44,149,000 |  | $ 42,737,000
Purchased loans |  |  |  |  |
Loans and Allowance for Loan Losses (Textual) [Abstract] |  |  |  |  |
Number of restructured loans | loan |  |  | 7 | 0 |
Average recorded investment in impaired loans | 7,836,000 | $ 4,397,000 | $ 7,684,000 | $ 4,363,000 |
Remaining availability under commitments to lend additional funds on restructured loans | 5,000 | 0 | 5,000 | 0 |
Purchased loans | Nonaccruing Loans |  |  |  |  |
Loans and Allowance for Loan Losses (Textual) [Abstract] |  |  |  |  |
Outstanding balance of restructured loans | 534,000 |  | 534,000 |  |
Purchased loans | Restructured Loans |  |  |  |  |
Loans and Allowance for Loan Losses (Textual) [Abstract] |  |  |  |  |
Outstanding balance of restructured loans | 446,000 | 4,979,000 | 446,000 | 4,979,000 |
Allowance for loan losses attributable to restructured loans | 27,000 | 34,000 | $ 27,000 | $ 34,000 |
Non purchased loans and leases |  |  |  |  |
Loans and Allowance for Loan Losses (Textual) [Abstract] |  |  |  |  |
Number of restructured loans | loan |  |  | 1 | 0 |
Restructured loans discontinued past due period (in days) |  |  | 90 days | 90 days |
Average recorded investment in impaired loans | 25,726,000 | 29,233,000 | $ 26,148,000 | $ 29,791,000 |
Remaining availability under commitments to lend additional funds on restructured loans | 0 | 0 | 0 | 0 |
Non purchased loans and leases | Nonaccruing Loans |  |  |  |  |
Loans and Allowance for Loan Losses (Textual) [Abstract] |  |  |  |  |
Outstanding balance of restructured loans | 71,000 |  | 71,000 |  |
Non purchased loans and leases | Restructured Loans |  |  |  |  |
Loans and Allowance for Loan Losses (Textual) [Abstract] |  |  |  |  |
Outstanding balance of restructured loans | 4,409,000 | 5,562,000 | 4,409,000 | 5,562,000 |
Allowance for loan losses attributable to restructured loans | $ 238,000 | $ 790,000 | $ 238,000 | $ 790,000 |

X
- Definition Loans and the allowance for loan losses. + References No definition available. + Details
Name: | rnst_LoansAndAllowanceForLoanLossesTextualAbstract
Namespace Prefix: | rnst_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Restructured Loans + References No definition available. + Details
Name: | rnst_NumberofRestructuredLoans
Namespace Prefix: | rnst_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum duration past due for restructured loans to be considered performing. + References No definition available. + Details
Name: | rnst_RestructuredLoansDiscontinuedPastDuePeriod
Namespace Prefix: | rnst_
Data Type: | xbrli:durationItemType
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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=84173941&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 allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18794-111554 + Details
Name: | us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes loans held for sale. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_LoansReceivableNet
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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rnst_NonaccruingLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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