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Share-based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Share-based Compensation [Abstract]

Stock Option Activity

The following table is a summary of our stock option activity:

​

​	​	​	​	​	​	​	​	​	​
​	Nine months ended September 30,
​	2020				​	2019
​	Awards	​	Weighted-Average Exercise Price		​	Awards	​	Weighted-Average Exercise Price
(awards in thousands)	​	​	​	​	​	​	​	​	​
Outstanding at beginning of period	97	​	$	52.53	​	107	​	$	49.26
Exercised	(24)	​	​	58.80	​	(10)	​	​	28.21
Forfeited	(6)	​	​	68.84	​	-	​	​	-
Outstanding at end of the period	67	​	$	48.71	​	97	​	$	52.53
Exercisable at end of the period	48	​	$	40.83	​	52	​	$	40.96

Restricted Stock Activity

​	​	​	​	​	​	​	​	​	​
​	Nine months ended September 30,
​	2020				​	2019
​	Shares	​	Weighted-Average Grant Date Fair Value		​	Shares	​	Weighted-Average Grant Date Fair Value
(shares in thousands)	​	​	​	​	​	​	​	​	​
Outstanding at beginning of period	46	​	$	98.28	​	57	​	$	50.55
Granted	43	​	​	113.68	​	28	​	​	130.89
Vested	(30)	​	​	86.79	​	(32)	​	​	47.14
Forfeited	(7)	​	​	108.81	​	(2)	​	​	167.48
Outstanding at end of the period	52	​	$	116.29	​	51	​	$	91.98

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- References

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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
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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
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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-Publisher FASB
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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