XML 43 R32.htm IDEA: XBRL DOCUMENT
v3.21.2

Mortgage Servicing Rights (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2021
Transfers and Servicing [Abstract] |
Changes in the company's MSRs | Changes in the Company’s MSRs were as follows:
Balance at January 1, 2021 | $ | 62,994 |
Capitalization | 26,532 |
Amortization | (16,700) |
Valuation adjustment | 13,561 |
Balance at September 30, 2021 | $ | 86,387 |
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:
| September 30, 2021 |  | December 31, 2020
Unpaid principal balance | $ | 8,470,973 |  |  | $ | 7,322,671 |
Weighted-average prepayment speed (CPR) | 11.68 | % |  | 15.05 | %
Estimated impact of a 10% increase | $ | (4,258) |  |  | $ | (4,001) |
Estimated impact of a 20% increase | (8,254) |  |  | (7,674) |
Discount rate | 9.83 | % |  | 9.86 | %
Estimated impact of a 10% increase | $ | (3,381) |  |  | $ | (2,144) |
Estimated impact of a 20% increase | (6,520) |  |  | (4,144) |
Weighted-average coupon interest rate | 3.33 | % |  | 3.58 | %
Weighted-average servicing fee (basis points) | 30.52 |  |  | 29.94 |
Weighted-average remaining maturity (in years) | 6.23 |  | 5.14

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: | dtr-types: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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746 + Details
Name: | us-gaap_ScheduleOfServicingAssetsAtAmortizedValueTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types: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