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Stock-Based Compensation Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2019
Stock-Based Compensation [Abstract]  
Stock-based compensation expense [Table Text Block]
Stock-based compensation expense for the years ended December 31, 2019, 2018 and 2017 is as follows:
 
Year Ended December 31,
(In thousands)
2019
 
2018
 
2017
Stock options
$
1,273

 
$
1,388

 
$
2,023

Restricted share units
5,685

 
4,573

 
1,873

Total stock-based compensation expense
6,958

 
5,961

 
3,896

Tax benefit recognized in the statements of earnings
1,562

 
1,739

 
1,442

Stock-based compensation expense, net of tax
$
5,396

 
$
4,222

 
$
2,454
Stock option activity [Table Text Block]
Information with respect to stock option activity related to the Plans for the year ended December 31, 2019 follows:
 
Equity Awards
Outstanding
 
Weighted Average
Exercise Price
 
Weighted Average
Remaining Contractual Life
 
Aggregate Intrinsic
Value
(In thousands)
Balance outstanding at January 1, 2019
2,468,900

 
$
19.37

 
 
 
 
Granted
381,198

 
22.53

 
 
 
 
Exercised
(551,008
)
 
12.36

 
 
 
 
Forfeited
(224,396
)
 
10.54

 
 
 
 
Expired
(239,832
)
 
30.96

 
 
 
 
Balance outstanding at December 31, 2019
1,834,862

 
$
21.70

 
6.12
 
$
4,464

 
 
 
 
 
 
 
 
Exercisable at December 31, 2019
973,036

 
$
27.60

 
4.15
 
$
4,469
Weighted average fair values of options granted [Table Text Block]
The weighted average fair values of the options granted under the Plans were calculated using the Black-Scholes method. The weighted average grant date fair value and weighted average assumptions used in the option pricing models are as follows: 
 
Year Ended December 31,
 
2019
 
2018
 
2017
Weighted average grant date fair value
$
8.92

 
$
3.80

 
$
2.92

Weighted average risk free interest rate
2.07
%
 
2.51
%
 
1.78
%
Weighted average expected dividend yield
1.28
%
 
—
%
 
3.03
%
Weighted average expected volatility
50.93
%
 
49.58
%
 
45.44
%
Weighted average expected life (in years)
4.63

 
4.63

 
4.50
Nonvested restricted stock units activity [Table Text Block]
Information with respect to non-vested restricted stock unit activity follows:
 
Restricted Awards
Outstanding
 
Weighted Average
Grant Date Fair Value
Balance outstanding at January 1, 2019
1,855,862

 
$
8.82

Granted
512,567

 
28.24

Vested
(351,469
)
 
10.58

Forfeited
(446,560
)
 
10.19

Balance outstanding at December 31, 2019
1,570,400

 
$
14.38