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Equity Incentive Plan (Tables)

12 Months Ended

Dec. 31, 2019

Equity Incentive Plan

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

​

​	​	​	​	​	​
​		Shares		Weighted Average
​	​	Outstanding	​	Grant Date
​	​	(in thousands)	​	Fair Value
Unvested restricted stock at December 31, 2016		228	​	$	33.02
​	​	​	​	​	​
Restricted stock granted		88	​	$	48.59
Restricted stock vested		(78)	​	$	30.95
Restricted stock forfeited		(11)	​	$	39.68
​	​	​	​	​	​
Unvested restricted stock at December 31, 2017		227	​	$	39.47
​	​	​	​	​	​
Restricted stock granted		57	​	$	48.85
Restricted stock vested		(71)	​	$	36.06
Restricted stock forfeited		(1)	​	$	48.28
​	​	​	​	​	​
Unvested restricted stock at December 31, 2018		212	​	$	42.74
​	​	​	​	​	​
Restricted stock granted		54	​	$	65.85
Restricted stock vested		(70)	​	$	39.55
Restricted stock forfeited		(2)	​	$	54.08
​	​	​	​	​	​
Unvested restricted stock at December 31, 2019		194	​	$	50.71

Summary of activity of performance shares

​

​	​	​	​	​	​
​		Target Number		Weighted Average
​	​	of Awards	​	Grant Date
Performance shares at December 31, 2017		—	​	$	—
​	​	​	​	​	​
Performance shares granted		31	​	$	47.73
​	​	​	​	​	​
Performance shares at December 31, 2018		31	​	$	47.73
​	​	​	​	​	​
Performance units granted		30	​	$	65.66
​	​	​	​	​	​
Performance units and shares at December 31, 2019		61	​	$	56.57

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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=116856206&loc=d3e5070-113901

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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.

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