XML 81 R51.htm IDEA: XBRL DOCUMENT v3.22.0.1

STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2021

STOCK-BASED COMPENSATION

Summary of stock option activity

​

​	​	​	​	​	​	​
​	​	​	​	Weighted		​
​	​	Number of	​	average exercise		​
​		Shares		price		​
Outstanding, January 1, 2019	​	369,483	​	$	26.40	​
Exercised	​	358,649	​	​	26.63	​
Outstanding, December 31, 2019		10,834	​	$	18.59	​
Exercised		10,834	​	​	18.59	​
Outstanding, December 31, 2020		—	​	$	—	​
Exercised		—	​	​	—	​
Outstanding and exercisable December 31, 2021	​	—	​	$	—	​

Summary of restricted stock activity

​

​	​	​	​	​	​	​
​	​	​	​	Weighted
​	​	Number of	​	average grant
​		shares		date fair value
Nonvested stock at January 1, 2019	​	631,764	​	$	85.85	​
Granted	​	216,891	​	​	93.45	​
Vested	​	(313,856)	​	​	83.25	​
Forfeited	​	(98,786)	​	​	85.50	​
Nonvested stock at December 31, 2019	​	436,013	​	$	91.58	​
Granted	​	193,912	​	​	115.89	​
Vested	​	(272,258)	​	​	88.32	​
Forfeited	​	(15,585)	​	​	106.70	​
Nonvested stock at December 31, 2020		342,082	​	$	108.40	​
Granted		298,084	​	​	92.32	​
Vested		(166,598)	​	​	106.13	​
Forfeited		(30,249)	​	​	97.01	​
Nonvested stock at December 31, 2021		443,319	​	$	99.22	​

Summary of performance-based restricted stock units

​

​	​	​	​	​	​	​
​	​	​	​	Weighted		​
​	​	Number of	​	average grant		​
​		Shares		date fair value		​
Nonvested stock at January 1, 2019	​	151,842	​	$	100.81	​
Granted	​	86,134	​	​	88.22	​
Vested	​	(69,372)	​	​	74.56	​
Forfeited	​	(36,356)	​	​	97.78	​
Nonvested stock at December 31, 2019	​	132,248	​	$	107.21	​
Granted	​	72,975	​	​	125.62	​
Vested	​	(48,053)	​	​	108.91	​
Forfeited	​	(34,504)	​	​	109.85	​
Nonvested stock at December 31, 2020		122,666	​	$	115.18	​
Granted		71,302	​	​	98.32	​
Vested		(29,468)	​	​	111.45	​
Forfeited		(12,090)	​	​	110.20	​
Nonvested stock at December 31, 2021		152,410	​	$	108.41	​

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

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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration