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Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2021

Stock-based Compensation

Summary of changes in, the Company's stock option awards

A summary of the status of, and changes in, the Company's stock option awards for the six months ended June 30, 2021, follows:

​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	Weighted-
​	​	​			Weighted-		​	Average
​	​	​	​	​	Average		​	Remaining
​	​	​	​	​	Exercise		​	Contractual
​		Shares			Price			Life
Outstanding at beginning of period	​		39,085		$	23.53	​	​	5.88
Expired	​		(6,379)	​		23.53	​	​	​
Outstanding at end of period	​		32,706		$	23.53		​	5.38
​	​	​	​	​	​	​	​	​	​
Exercisable at end of period	​		32,706		$	23.53		​	5.38

Summary of changes in the Company's RSU, PSU, and DSU awards

A summary of changes in the Company’s RSU, PSU, and DSU awards for the six months ended June 30, 2021, is as follows:

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​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

RSU Awards

​

PSU Awards

​

DSU Awards

​

​

​

​

​

Weighted-

​

​

​

​

Weighted-

​

​

​

​

Weighted-

​

​

​

​

Average

​

​

​

Average

​

​

​

Average

​

​

​

​

Grant Date

​

​

​

Grant Date

​

​

​

Grant Date

​

Shares

Fair Value

Shares (1)

Fair Value

Shares

Fair Value

Nonvested at beginning of period

​

1,017,038

$

23.87

​

15,724

$

16.25

​

34,263

$

17.18

Granted

​

212,426

​

24.54

​

99,159

​

23.91

​

35,664

​

24.59

Dividend equivalents earned

​

22,573

​

22.82

​

—

​

—

​

2,459

​

22.93

Vested

​

—

​

—

​

—

​

—

​

(1,452)

​

22.63

Forfeited

​

(19,907)

​

25.04

​

(459)

​

23.48

​

—

​

—

Nonvested at end of period

​

1,232,130

$

23.95

​

114,424

$

22.86

​

70,934

$

20.99

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​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Vested and outstanding at end of period

​

​

​

​

​

​

​

​

​

​

​

​

72,496

$

24.30

Schedule of Stock-based compensation expense

Stock-based compensation expense related to nonvested restricted stock units, deferred stock units, and performance-based restricted stock awards is presented in the table below (dollars in thousands):

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Three Months Ended June 30,

​

Six Months Ended June 30,

​

2021

2020

2021

2020

Stock-based compensation expense

​

​

​

​

​

​

​

​

​

​

​

​

RSU awards

​

$

1,816

​

$

924

​

$

3,046

​

$

2,069

PSU awards

​

​

268

​

​

—

​

​

328

​

​

—

DSU awards

​

​

353

​

​

145

​

​

511

​

​

139

Total stock-based compensation expense

​

$

2,437

​

$

1,069

​

$

3,885

​

$

2,208

Schedule of Unamortized stock-based compensation expense

Unamortized stock-based compensation expense related to nonvested restricted stock units, deferred stock units, and performance-based restricted stock awards is presented in the table below (dollars in thousands):

​

​	​	​	​	​	​	​	​
​	​	As of					​
​	​	June 30,		​	December 31,		​
​		2021			2020
Unamortized stock-based compensation expense	​	​	​	​	​	​	​
RSU awards	​	$	12,094	​	$	10,411	​
PSU awards	​	​	1,690	​	​	179	​
DSU awards	​	​	660	​	​	294	​
Total unamortized stock-based compensation expense	​	$	14,444	​	$	10,884	​
​	​	​	​	​	​	​	​
Weighted average period over which expense is to be recognized	​	​	3.2	yrs	​	3.0	yrs

Schedule of shares remaining available for issuance pursuant to authorized plans

​

​	​	​	​
​	​	Shares Remaining
​	​	Available for Issuance
​		Pursuant to the Plans
2020 Equity Plan	​	​	1,087,266
2021 Employee Stock Purchase Plan	​	​	600,000

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