XML 64 R49.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Stock Incentive Compensation and Employee Benefit Plans (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Payment Award, Performance Shares, Valuation Assumptions | The following are the weighted average-assumptions used to estimate the fair value for all performance shares issued in each respective year.
|  | Performance Shares |
| Year ended December 31, | 2017 |  | 2016 |
| Expected volatility (1) | 14.3% |  | 14.3% - 14.7% |
| Expected term (in years) | n/a |  | n/a |
| Expected dividend yield | n/a |  | n/a |
| Risk-free interest rate (1) | 0.93% - 1.69% |  | 0.38% - 1.18% |
(1) | The expected volatility and risk-free interest rate applied are specific to each tranche of performance shares.
Schedule of Share-based Compensation, Options and Premium Option Plan Awards | The following is a summary of activity under the Company’s stock compensation plans. Options
|  | Weighted options outstanding |  | Weighted average exercise price |  | Weighted average remaining contractual life |  | Aggregate intrinsic value |  | Range of exercise prices |
| Balance, December 31, 2014 | 767,830 |  |  | $ | 48.71 |  |  | 2.0 |  | $ | 37,246 |  |  | $37.51 - $59.66 |  |
| Options granted | — |  |  | — |  |  |  |  |  |  | — |  |
| Options forfeited | — |  |  | — |  |  |  |  |  |  |  |
| Options expired | — |  |  | — |  |  |  |  |  |  |  |
| Options exercised | (359,618 | ) |  | 45.09 |  |  |  |  | $ | 21,205 |  |  |  |
| Balance, December 31, 2015 | 408,212 |  |  | $ | 51.90 |  |  | 1.6 |  | $ | 25,020 |  |  | $42.66 - $59.66 |  |
| Options granted | — |  |  | — |  |  |  |  |  |  | — |  |
| Options forfeited | — |  |  | — |  |  |  |  |  |  |  |
| Options expired | — |  |  | — |  |  |  |  |  |  |  |
| Options exercised | (201,417 | ) |  | 50.59 |  |  |  |  | $ | 14,806 |  |  |  |
| Balance, December 31, 2016 | 206,795 |  |  | $ | 53.17 |  |  | 0.9 |  | $ | 17,174 |  |  | $50.71 - $59.66 |  |
| Options granted | — |  |  | — |  |  |  |  |  |  | — |  |
| Options forfeited | — |  |  | — |  |  |  |  |  |  |  |
| Options expired | — |  |  | — |  |  |  |  |  |  |  |
| Options exercised | (174,794 | ) |  | $ | 53.04 |  |  |  |  | $ | 15,945 |  |  |  |
| Balance, December 31, 2017 | 32,001 |  |  | $ | 53.86 |  |  | 0.2 |  | $ | 2,295 |  |  | $ | 53.86 |  |
| Total options exercisable at December 31, 2017 | 32,001 |  |  | $ | 53.86 |  |  | 0.2 |  | $ | 2,295 |  |  | $ | 53.86 |  |
Schedule of Share-based Compensation, Cash Settled Restricted Stock Units and Performance Shares | Cash Settled Restricted Stock Units
|  | Number of shares |
| Nonvested at December 31, 2014 | 338,323 |  |
| Awards granted | 160,817 |  |
| Awards vested | (144,440 | ) |
| Awards forfeited | (28,622 | ) |
| Nonvested at December 31, 2015 | 326,078 |  |
| Awards granted | 135,119 |  |
| Awards vested | (133,278 | ) |
| Awards forfeited | (19,575 | ) |
| Nonvested at December 31, 2016 | 308,344 |  |
| Awards granted | 98,067 |  |
| Awards vested | (122,088 | ) |
| Awards forfeited | (21,993 | ) |
| Nonvested at December 31, 2017 | 262,330 |  |
Performance Shares
|  | Number of shares (1) |  | Weighted average grant-date fair value |
| Nonvested at December 31, 2014 | 248,572 |  |  | $ | 39.62 |  |
| Awards granted | 103,024 |  |  | $ | 44.98 |  |
| Awards vested | — |  |  |  |
| Awards forfeited | (121,325 | ) |  |  |
| Nonvested at December 31, 2015 | 230,271 |  |  | $ | 41.40 |  |
| Awards granted | 77,045 |  |  | $ | 48.31 |  |
| Awards vested | (58,032 | ) |  | $ | 38.30 |  |
| Awards forfeited | (37,903 | ) |  |  |
| Nonvested at December 31, 2016 | 211,381 |  |  | $ | 44.63 |  |
| Awards granted | 64,947 |  |  | $ | 65.27 |  |
| Awards vested | (62,499 | ) |  | $ | 43.51 |  |
| Awards forfeited | (46,156 | ) |  |  |
| Nonvested at December 31, 2017 | 167,673 |  |  | $ | 53.11 |  |
(1) | For performance shares, the number of shares is stated at the maximum number that can be attained if the performance conditions are fully met. Forfeitures represent shares forfeited due to vesting below the maximum attainable as a result of the Company not fully meeting the performance conditions.
Schedule of Share-based Compensation, Restricted Stock Awards | Restricted Stock Awards
|  | Employee restricted stock awards |  | Non-employee director restricted stock awards |  | Total restricted stock awards |
|  | Number of shares |  | Weighted average grant date fair value |  | Number of shares |  | Weighted average grant date fair value |  | Number of shares |  | Weighted average grant date fair value |
| Nonvested at December 31, 2014 | 451,722 |  |  | $ | 87.29 |  |  | 30,055 |  |  | $ | 88.41 |  |  | 481,777 |  |  | $ | 87.36 |  |
| Awards granted | 195,337 |  |  | 102.17 |  |  | 14,575 |  |  | 102.90 |  |  | 209,912 |  |  | 102.22 |  |
| Awards vested | (168,019 | ) |  | 82.75 |  |  | (17,744 | ) |  | 86.37 |  |  | (185,763 | ) |  | 83.10 |  |
| Awards forfeited | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |
| Nonvested at December 31, 2015 | 479,040 |  |  | $ | 94.95 |  |  | 26,886 |  |  | $ | 97.61 |  |  | 505,926 |  |  | $ | 95.09 |  |
| Awards granted | 179,003 |  |  | 112.41 |  |  | 14,727 |  |  | 114.71 |  |  | 193,730 |  |  | 112.59 |  |
| Awards vested | (255,873 | ) |  | 93.98 |  |  | (16,068 | ) |  | 96.83 |  |  | (271,941 | ) |  | 94.15 |  |
| Awards forfeited | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |
| Nonvested at December 31, 2016 | 402,170 |  |  | $ | 103.34 |  |  | 25,545 |  |  | $ | 107.95 |  |  | 427,715 |  |  | $ | 103.61 |  |
| Awards granted | 116,345 |  |  | 148.66 |  |  | 12,193 |  |  | 150.05 |  |  | 128,538 |  |  | 148.79 |  |
| Awards vested | (185,478 | ) |  | 100.17 |  |  | (17,612 | ) |  | 110.66 |  |  | (203,090 | ) |  | 101.08 |  |
| Awards forfeited | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |
| Nonvested at December 31, 2017 | 333,037 |  |  | $ | 120.93 |  |  | 20,126 |  |  | $ | 131.09 |  |  | 353,163 |  |  | $ | 121.51 |  |

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of performance share, including, but not limited to: (a) expected term of performance shares and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, and (d) risk-free rate(s). + References No definition available. + Details
Name: | rnr_ScheduleOfShareBasedPaymentAwardPerformanceSharesValuationAssumptionsTableTextBlock
Namespace Prefix: | rnr_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration