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Incentive Stock Plans (Tables)
 12 Months Ended
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]  
Schedule of Stock Option Activity
A summary of the Company’s stock option activity is presented below for the year ended December 31, 2019:
 
Stock Options
 
Options
 
Weighted Average Exercise Price
 
Weighted Average Remaining Contractual Term (in years)
 
Aggregate Intrinsic Value
Outstanding at January 1, 2019
286,613

 
$
34.23

 
 
 
 
Forfeited
—

 
—

 
 
 
 
Exercised
—

 
—

 
 
 
 
Expired
(81,587
)
 
29.54

 
 
 
 
Outstanding at December 31, 2019
205,026

 
$
36.10

 
2.4
 
$
—

Options vested and expected to vest
205,026

 
$
36.10

 
2.4
 
$
—

Options exercisable at December 31, 2019
205,026

 
$
36.10

 
2.4
 
$
—
Summary of Additional Information for Stock Options Granted to Employees
A summary of additional information pertaining to stock options granted to employees is presented below:
 
2019
 
2018
 
2017
Intrinsic value of options exercised
$
—

 
$
108

 
$
1

Fair value of options vested
$
—

 
$
—

 
$
210
Summary of Activity for Restricted Shares Granted to Employees
The following table summarizes the activity of restricted stock and stock units granted to employees for the three years ended December 31:
 
2019
 
2018
 
2017
Restricted stock and stock units granted
395,260

 
301,384

 
285,506

Weighted average price of restricted stock or units granted
$
11.99

 
$
19.73

 
$
13.37

Intrinsic value of restricted stock and units outstanding
$
3,201

 
$
9,767

 
$
17,349

Fair value of restricted stock and units vested
$
4,881

 
$
3,753

 
$
1,119
Summary of Restricted Stock Activity
A summary of the Company’s restricted stock and stock units activity is presented below for the year ended December 31, 2019:
 
Restricted Stock and Stock Units
 
Awards
 
Weighted Average Grant Date Fair Value
Outstanding at January 1, 2019
917,098

 
$
13.71

Granted
395,260

 
11.99

Forfeited
(20,014
)
 
15.06

Vested
(458,748
)
 
10.64

Outstanding at December 31, 2019
833,596

 
$
14.55
Summary of Activity for Performance Shares Granted to Employees
The following table summarizes the activity of the Company’s performance-based stock units awarded to its employees for the three years ended December 31:
 
2019
 
2018
 
2017
Common shares of stock reserved for performance-based stock units
980,641

 
1,115,747

 
896,121

Weighted average fair value of performance-based
stock units granted
$
14.98

 
$
22.75

 
$
14.60

Intrinsic value of outstanding performance-based stock units
$
4,572

 
$
4,774

 
$
7,408
Summary of Performance Share Activity
A summary of the Company’s performance-based stock unit award activity is presented below for the year ended December 31, 2019:
 
Performance-Based Stock Units
 
Awards
 
Weighted Average Grant Date Fair Value
Outstanding at January 1, 2019
1,325,894

 
$
14.69

Granted
400,404

 
14.98

Forfeited
(15,605
)
 
16.90

Vested
(520,167
)
 
7.80

Outstanding at December 31, 2019
1,190,526

 
$
17.77
Summary of Performance Share Assumptions Used in Fair Value Calculation The following chart provides a tabular overview of the weighted average assumptions used in calculating the fair value of the awards granted for the three years ended December 31:
 
2019
 
2018
 
2017
Expected volatility
49.5
%
 
68.7
%
 
70.2
%
Risk-free rate
2.5
%
 
2.4
%
 
1.5
%