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Capital Stock and Share Based Compensation Plans (Tables)
 12 Months Ended
Dec. 31, 2018
Equity [Abstract]  
Schedule of options outstanding and exercisable
The following table summarizes our stock option activity:
 
 
Number
of Shares
 
Weighted-
Average
Exercise Price
 
Range of
Exercise
Prices
 
 
 
 
 
 
 
Outstanding at December 31, 2015
 
996,879

 
$
7.45

 
$ 6-9

Exercised
 
(509,965
)
 
8.07

 
8-9

Outstanding at December 31, 2016
 
486,914

 
6.81

 
6-9

Exercised
 
(235,407
)
 
6.20

 
6-8

Outstanding at December 31, 2017
 
251,507

 
7.38

 
6-9

Exercised
 
(251,507
)
 
7.38

 
6-9

Outstanding at December 31, 2018
 
—

 
—

 
—
Schedule of cash proceeds received from exercises of stock options
The following table summarizes additional information about exercises of stock options:
 
 
For the years ended December 31,
(in thousands)
 
2018
 
2017
 
2016
 
 
 
 
 
 
 
Cash received upon exercise
 
$
1,857

 
$
1,461

 
$
4,641

Intrinsic value (market value on date of exercise less exercise price)
 
1,266

 
3,919

 
4,888

Tax benefits realized
 
315

 
1,497

 
1,877
Restricted stock and restricted stock unit vesting activity
The following table summarizes our RSU activity:
 
 
 
 
Fair Value
 
 
Number
of Shares
 
Weighted
Average
 
Range of
Prices
 
 
 
 
 
 
 
Unvested at December 31, 2015
 
910,041

 
$
18.22

 
$ 10-24
Awarded
 
996,839

 
15.76

 
13-18
Vested
 
(444,267
)
 
17.78

 
13-19
Forfeited
 
(37,436
)
 
16.82

 
12-24
Unvested at December 31, 2016
 
1,425,177

 
17.05

 
12-24
Awarded
 
653,522

 
22.51

 
17-24
Vested
 
(581,920
)
 
20.78

 
14-24
Forfeited
 
(308,856
)
 
17.20

 
14-24
Unvested at December 31, 2017
 
1,187,923

 
19.99

 
14-24
Awarded
 
816,771

 
13.28

 
11-17
Vested
 
(771,904
)
 
14.16

 
11-18
Forfeited
 
(57,348
)
 
16.68

 
13-23
Unvested at December 31, 2018
 
1,175,442

 
15.86

 
11-24
Additional information about restricted stock and restricted stock unit vesting
The following table summarizes additional information about RSU vesting:
 
 
For the years ended December 31,
(in thousands)
 
2018
 
2017
 
2016
 
 
 
 
 
 
 
Fair value of RSUs vested
 
$
10,930

 
$
12,090

 
$
7,898

Tax benefits realized on vesting
 
1,758

 
4,630

 
3,033
Schedule of stock compensation costs
Share-based compensation costs were as follows:
 
 
For the years ended December 31,
(in thousands)
 
2018
 
2017
 
2016
 
 
 
 
 
 
 
Total share-based compensation
 
$
11,008

 
$
12,960

 
$
8,093

Included in discontinued operations
 
(227
)
 
(465
)
 
(270
)
Included in continuing operations
 
$
10,781

 
$
12,495

 
$
7,823

Share-based compensation, net of tax
 
$
8,100

 
$
7,717

 
$
4,835