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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]  
Stock Based Compensation Expense
The following table discloses the amount of stock-based compensation expense:
 
 
Stock-Based Compensation
 
 
2019
 
2018
 
2017
Stock options
 
$
—

 
$
—

 
$
14

Restricted stock units
 
2,836

 
3,196

 
3,302

Performance stock units
 
1,526

 
672

 
693

Total stock-based compensation
 
$
4,362

 
$
3,868

 
$
4,009
Summarized Information for the Plans
Summarized information for the plans follows:
 
 
Number of
Shares
 
Weighted
Average
Exercise
Price (per share)
 
Aggregate
Intrinsic
Value
(thousands)
Outstanding at December 31, 2018
 
268,802

 
$
22.27

 
 
Granted
 
—

 
—

 
 
Exercised
 
(24,774
)
 
12.50

 
 
Expired
 
—

 
—

 
 
Canceled
 
(5,280
)
 
21.72

 
 
Outstanding at December 31, 2019
 
238,748

 
23.30

 
$
2,157

Exercisable at December 31, 2019
 
238,748

 
23.30

 
2,157


 
 
 
 
 
 
 
 
 
Year ended December 31,
 
 
2019
 
2018
 
2017
Weighted average grant-date fair value of options granted (per share)
 
$
—

 
$
—

 
$
—

Aggregate intrinsic value of options exercised (thousands)
 
425

 
298

 
4,194

Weighted average grant-date fair value of shares vested (thousands)
 
—

 
—

 
1,400
Segregated Disclosure of Options Outstanding
Segregated disclosure of options outstanding at December 31, 2019 was as follows:
 
 
Range of Exercise Prices
 
 
Less than or
equal to $15.63
 
Greater than
$15.63
Options outstanding
 
22,965

 
215,783

Weighted average exercise price
 
$
15.63

 
$
24.11

Remaining contractual life
 
2.1

 
3.2

Options exercisable
 
22,965

 
215,783

Weighted average exercise price
 
$
15.63

 
$
24.11
Details of Nonvested Restricted Stock Units Activity
The following table provides details of the nonvested restricted stock units for 2019:
 
 
Number of
Restricted Units
 
Weighted Average
Grant-Date Fair
Value (per share)
 
Aggregate
Intrinsic
Value
(thousands)
Nonvested at December 31, 2018
 
240,991

 
$
35.69

 
 
Granted
 
120,001

 
32.52

 
 
Vested
 
(91,237
)
 
36.56

 
 
Canceled
 
(42,667
)
 
36.90

 
 
Accrued dividend equivalents
 
3,874

 
34.07

 
 
Nonvested at December 31, 2019
 
230,962

 
$
33.49

 
 
Vested but not released
 
1,483

 
$
18.04

 
 
Outstanding at December 31, 2019
 
232,445

 
$
33.39

 
$
7,761

 
 
 
 
 
 
 
Weighted-average remaining contractual term of shares outstanding (months)
 
21

 
 
 
 
 
 
 
 
 
 
 
 
 
Year ended December 31,
 
 
2019
 
2018
 
2017
Weighted average grant-date fair value of restricted shares granted (per share)
 
$
32.52

 
$
34.53

 
$
38.33

Weighted average grant-date fair value of shares vested (thousands)
 
$
3,336

 
$
3,000

 
$
5,627
Performance Based Units Earned under Long-Term Incentive Plan
The following table provides details of the nonvested performance stock units earned under the Company’s Long-Term Incentive Plan:
 
 
Number of
Performance 
Units
 
Weighted
Average Grant-
Date Fair Value
(per share)
 
Aggregate
Intrinsic
Value
(thousands)
Nonvested at December 31, 2018
 
32,071

 
$
27.79

 
 
Earned
 
69,938

 
33.27

 
 
Vested
 
(30,705
)
 
34.93

 
 
Canceled
 
(12,472
)
 
34.35

 
 
Accrued dividend equivalents
 
503

 
36.13

 
 
Nonvested at December 31, 2019
 
59,335

 
$
33.79

 
 
Vested but not released
 
22,529

 
$
34.31

 
 
Outstanding at December 31, 2019
 
81,864

 
$
33.93

 
$
2,778

 
 
 
 
 
 
 
Weighted-average remaining contractual term of performance stock units outstanding (months)
 
12

 
 
 
 
 
 
 
 
 
 
 
 
 
Year ended December 31,
 
 
2019
 
2018
 
2017
Weighted average grant-date fair value of performance stock units granted (per share)
 
$
33.27

 
$
36.08

 
$
38.23

Weighted average grant-date fair value of performance stock units vested (thousands)
 
$
1,073

 
$
1,821

 
$
4,213