XML 38 R24.htm IDEA: XBRL DOCUMENT
v3.20.4

Share-Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Restricted Stock Award Activity for Employees and Non-Employee Directors | The following table summarizes our restricted stock award activity for employees and non-employee directors:
|  | Shares |  | Weighted Average Grant Date Fair Value Per Share
Unvested at January 1, 2020 |  |  | 163,723 |  |  | $ | 90.65 |
Granted |  |  | 75,638 |  |  |  | 149.38 |
Vested |  |  | (80,349 | ) |  |  | 85.68 |
Forfeited |  |  | (19,149 | ) |  |  | 117.86 |
Unvested at December 31, 2020 |  |  | 139,863 |  |  | $ | 121.53 |
Summary of Activity for PBRSUs for Employees | The following table summarizes our activity for PBRSUs for employees during 2020:
|  | Shares |  |  | Weighted Average Grant Date Fair Value Per Share |
Unvested at January 1, 2020 |  |  | — |  |  | $ | — |
Granted (a) |  |  | 31,072 |  |  |  | 146.29 |
Vested |  |  | — |  |  |  | — |
Forfeited |  |  | — |  |  |  | — |
Unvested at December 31, 2020 |  |  | 31,072 |  |  | $ | 146.29 |
(a) Amount represents PBRSUs granted at target. PBRSUs earned may range from zero to 200% of the target award. Actual PBRSUs earned for the 2020 performance period, as determined by the Compensation Committee, were equal to the target amount.
Summary of the Changes in the Number of Outstanding Phantom Stock Shares | A summary of the changes in the number of outstanding phantom stock awards during the year ended December 31, 2020 for the Phantom Plans is provided below:
|  | Employee Phantom Plans |  | Director Phantom Stock Plan |  | Total
Balance of shares outstanding at December 31, 2019 |  |  | 637,755 |  |  |  | 81,106 |  |  |  | 718,861 |
Granted |  |  | — |  |  |  | — |  |  |  | — |
Settled |  |  | (104,865 | ) |  |  | — |  |  |  | (104,865 | )
Forfeited |  |  | — |  |  |  | — |  |  |  | — |
Balance of shares outstanding at December 31, 2020 |  |  | 532,890 |  |  |  | 81,106 |  |  |  | 613,996 |

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 share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested performance-based units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock
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