XML 68 R48.htm IDEA: XBRL DOCUMENT
v3.22.2

STOCK-BASED COMPENSATION (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2022
STOCK-BASED COMPENSATION |
Summary of restricted stock activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted
​ | ​ | Number of | ​ | average grant
​ |  | Shares |  | date fair value
Nonvested stock at December 31, 2021 |  | 443,319 | ​ | $ | 99.22
Granted |  | 300,266 | ​ | ​ | 118.65
Vested |  | (196,447) | ​ | ​ | 99.58
Forfeited |  | (29,019) | ​ | ​ | 101.93
Nonvested stock at June 30, 2022 |  | 518,119 | ​ | $ | 110.19
Summary of performance-based restricted stock units | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted
​ | ​ | Number of | ​ | average grant
​ |  | Shares |  | date fair value
Nonvested stock at December 31, 2021 |  | 152,410 | ​ | $ | 108.41
Granted |  | 64,668 | ​ | ​ | 141.41
Vested |  | (16,834) | ​ | ​ | 96.00
Forfeited |  | (33,542) | ​ | ​ | 95.40
Nonvested stock at June 30, 2022 |  | 166,702 | ​ | $ | 125.08

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 shares. + 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) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested shares. + 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_ScheduleOfNonvestedShareActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration