XML 45 R34.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Mortgage Servicing Rights (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2018
Transfers and Servicing [Abstract] |
Changes in the Company's MSRs | Changes in the Company’s MSRs were as follows:
Balance at January 1, 2018 | $ | 39,339 |
Capitalization | 6,303 |
Amortization | (2,403 | )
Balance at June 30, 2018 | $ | 43,239 |
Data and key economic assumptions related to the Company's MSRs | Data and key economic assumptions related to the Company’s MSRs are as follows as of the dates presented:
| June 30, 2018 |  | December 31, 2017
Unpaid principal balance | $ | 4,315,261 |  |  | $ | 4,012,519 |
Weighted-average prepayment speed (CPR) | 7.32 | % |  | 8.04 | %
Estimated impact of a 10% increase | $ | (1,792 | ) |  | $ | (1,592 | )
Estimated impact of a 20% increase | (3,475 | ) |  | (3,095 | )
Discount rate | 9.42 | % |  | 9.69 | %
Estimated impact of a 10% increase | $ | (2,573 | ) |  | $ | (2,027 | )
Estimated impact of a 20% increase | (4,937 | ) |  | (3,896 | )
Weighted-average coupon interest rate | 3.94 | % |  | 3.89 | %
Weighted-average servicing fee (basis points) | 26.77 |  |  | 26.36 |
Weighted-average remaining maturity (in years) | 8.35 |  | 7.98

X
- Definition Schedule of fair value assumption related to mortgage servicing rights. + References No definition available. + Details
Name: | rnst_ScheduleOfFairValueAssumptionRelatedToMortgageServicingRightsTableTextBlock
Namespace Prefix: | rnst_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of activity in the balance of servicing assets subsequently measured at amortized cost. Includes, but is not limited to, beginning and ending balances, additions, disposals, and amortization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122739-111746 + Details
Name: | us-gaap_ScheduleOfServicingAssetsAtAmortizedValueTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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