XML 96 R74.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Securities (Details Textual) | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) security | Dec. 31, 2016 USD ($) institution | Dec. 31, 2016 USD ($) | Dec. 31, 2016 USD ($) Tranche | Dec. 31, 2015 USD ($) security | Dec. 31, 2014 USD ($) security
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |
Investments in pooled trust preferred securities, cost basis | $ 686,405,000 | $ 686,405,000 | $ 686,405,000 | $ 686,405,000 | $ 1,117,000 | $ 724,000
Available-for-sale securities, net proceeds |  |  |  |  | 1,213,000 | 1,099,000
Available-for-sale securities, gross realized gain (loss) |  |  | 1,186,000 |  | 96,000 | $ 375,000
Securities available for sale, at fair value | $ 674,248,000 | $ 674,248,000 | 674,248,000 | $ 674,248,000 | $ 646,805,000 |
Number of securities representing interests in tranches of trusts (tranches) | 3 |  |  | 3 | 3 |
Number of institutions issuing debt (institutions) | institution |  | 250 |  |  |  |
Number of securities, return to accrual status | security |  |  |  |  | 1 | 1
Trust preferred securities |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |
Investments in pooled trust preferred securities, cost basis | $ 23,749,000 | $ 23,749,000 | 23,749,000 | $ 23,749,000 | $ 24,770,000 |
Securities available for sale, at fair value | 18,389,000 | 18,389,000 | 18,389,000 | 18,389,000 | 19,469,000 |
Other than temporary impairment losses |  |  | 0 |  | 0 | $ 0
Secure government, public and trust deposits |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |
Available for sale securities pledged as collateral | 642,447,000 | 642,447,000 | 642,447,000 | 642,447,000 | 679,492,000 |
Short-term borrowings |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |
Available for sale securities pledged as collateral | 24,426,000 | 24,426,000 | 24,426,000 | 24,426,000 | 39,275,000 |
Heritage Financial Group |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |
Investments in pooled trust preferred securities, cost basis |  |  |  |  | 7,231,000 |
Available-for-sale securities, net proceeds |  |  |  |  | 7,231,000 |
Available-for-sale securities, gross realized gain (loss) |  |  |  |  | 0 |
Trust preferred securities |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |
Securities available for sale, at fair value | 18,389,000 | 18,389,000 | 18,389,000 | 18,389,000 | $ 19,469,000 |
Trust preferred securities | Pooled Trust Preferred Securities Xiii |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |
Investments in pooled trust preferred securities, cost basis | $ 2,842,000 | $ 2,842,000 | 2,842,000 | $ 2,842,000 |  |
Available-for-sale securities, net proceeds |  |  | 4,028,000 |  |  |
Available-for-sale securities, gross realized gain (loss) |  |  | $ 1,186,000 |  |  |

X
- Definition Number of institutions issuing debt. + References No definition available. + Details
Name: | rnst_NumberOfInstitutionsIssuingDebt
Namespace Prefix: | rnst_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of securities representing interests in tranches of trusts. + References No definition available. + Details
Name: | rnst_NumberOfSecuritiesRepresentingInterestsInTranchesOfTrusts
Namespace Prefix: | rnst_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Securities, Return to Accrual Status + References No definition available. + Details
Name: | rnst_NumberofSecuritiesReturntoAccrualStatus
Namespace Prefix: | rnst_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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 This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The total amount of proceeds received for the sale of securities, categorized neither as held-to-maturity nor trading securities, during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The fair value of available-for-sale securities that serve as collateral for borrowings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5086-111524 + Details
Name: | us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This element represents the amount of loss recognized for other than temporary impairments (OTTI) of investments in debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.M) -URI http://asc.fasb.org/extlink&oid=65877573&loc=d3e87990-122713 + Details
Name: | us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_InvestmentTypeAxis=rnst_SecureGovernmentPublicAndTrustDepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_ShortTermDebtMember
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: |

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

X
- Details
Name: | us-gaap_InvestmentTypeAxis=rnst_PooledTrustPreferredSecuritiesXiiiMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |