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Share-based Compensation (Tables)

3 Months Ended

Mar. 31, 2021

Share-based Compensation [Abstract]

Stock Option Activity

​

​	​	​	​	​	​	​	​	​	​
​	Three months ended March 31,
​	2021				​	2020
​	Awards	​	Weighted-Average Exercise Price		​	Awards	​	Weighted-Average Exercise Price
(awards in thousands)	​	​	​	​	​	​	​	​	​
Outstanding at beginning of period	61	​	$	48.19	​	97	​	$	52.51
Exercised	(11)	​	​	42.62	​	-	​	​	-
Outstanding at end of the period	50	​	$	49.43	​	97	​	$	52.51
Exercisable at end of the period	41	​	$	44.93	​	72	​	$	46.86

Restricted Stock Activity

​	​	​	​	​	​	​	​	​	​
​	Three months ended March 31,
​	2021				​	2020
​	Shares	​	Weighted-Average Grant Date Fair Value		​	Shares	​	Weighted-Average Grant Date Fair Value
(shares in thousands)	​	​	​	​	​	​	​	​	​
Outstanding at beginning of period	50	​	$	116.06	​	46	​	$	98.28
Granted	17	​	​	253.03	​	29	​	​	100.68
Vested	(14)	​	​	109.14	​	(21)	​	​	66.73
Forfeited	-	​	​	-	​	(3)	​	​	105.29
Outstanding at end of the period	53	​	$	157.80	​	51	​	$	112.43

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- References

No definition available.

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- Definition

Tabular disclosure of the changes in outstanding nonvested restricted stock 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

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- 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

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