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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following table provides the weighted-average assumptions used to determine the fair value of NSO awards granted during 2018, 2017 and 2016:
 
2018
 
2017
 
2016
Risk-free interest rate
2.66
%
 
2.17
%
 
1.35
%
Expected dividend yield
2.33
%
 
3.12
%
 
3.36
%
Expected stock price volatility
30.70
%
 
33.12
%
 
36.54
%
Expected life (in years)
6.25

 
6.25

 
6.25
Schedule of Share-based Compensation, Stock Options, Activity
A summary of activity, weighted average exercise prices and weighted average fair values related to the NSOs is as follows (shares in thousands):
 
Shares
 
Weighted Avg. Exercise Price
 
Weighted Avg.
Fair Value
 
Weighted Avg. Remaining Contractual Term
(in years)
 
Aggregate
Intrinsic Value
(In thousands)
Outstanding, December 31, 2015
1,375

 
$
60.62

 
$
30.47

 
8.3
 
$
—

Granted
1,363

 
30.43

 
7.46

 
 
 
 
Cancelled
(67
)
 
60.45

 
30.55

 
 
 
 
Forfeited
(275
)
 
39.89

 
15.04

 
 
 
 
Outstanding, December 31, 2016
2,396

 
$
45.82

 
$
19.15

 
8.2
 
$
6,163

Granted
932

 
32.12

 
7.97

 
 
 
 
Exercised
(400
)
 
28.31

 
8.54

 
 
 
 
Cancelled
(87
)
 
48.48

 
23.91

 
 
 
 
Forfeited
(447
)
 
29.24

 
8.31

 
 
 
 
Adjustment due to the 2017 Special Cash Dividend
453

 
*

 
*

 
 
 
 
Outstanding, December 31, 2017 (1)
2,847

 
$
39.00

 
$
15.49

 
6.6
 
$
21,897

Granted
202

 
42.85

 
11.33

 
 
 
 
Exercised
(65
)
 
28.62

 
7.92

 
 
 
 
Cancelled
(504
)
 
54.57

 
28.53

 
 
 
 
Forfeited
(49
)
 
30.04

 
8.05

 
 
 
 
Outstanding, December 31, 2018 (1)
2,431

 
36.54

 
12.79

 
7.1
 
$
25,908

Vested and exercisable,
December 31, 2018 (1)
1,270

 
$
40.43

 
$
16.60

 
6.3
 
$
10,682

 
*
Not meaningful
(1)
The weighted average exercise price and weighted-average fair value of options outstanding as of the end of each reporting period reflect the adjustments to the awards as a result of the special cash dividend.
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
A summary of activity and weighted average fair values related to the RSUs is as follows (shares in thousands):
 
Shares
 
Weighted Avg.
 Fair Value
 
Weighted Avg.
Remaining Contractual Term
(in years)
Outstanding and nonvested, December 31, 2015
840

 
$
58.39

 
2.3
Granted
824

 
29.97

 
 
Dividend equivalent units granted
34

 
37.20

 
 
Vested
(307
)
 
58.44

 
 
Dividend equivalent units vested
(6
)
 
41.32

 
 
Forfeited
(151
)
 
42.25

 
 
Dividend equivalent units forfeited
(3
)
 
39.01

 
 
Outstanding and nonvested, December 31, 2016 (1)
1,231

 
$
40.92

 
1.3
Granted
625

 
32.77

 
 
Dividend equivalent units granted
31

 
39.21

 
 
Vested
(575
)
 
38.21

 
 
Dividend equivalent units vested
(20
)
 
32.45

 
 
Forfeited
(399
)
 
32.35

 
 
Dividend equivalent units forfeited
(12
)
 
33.14

 
 
Adjustments due to the 2017 Special Cash Dividend
224

 
*

 
 
Outstanding and nonvested, December 31, 2017 (2)
1,105

 
$
32.62

 
1.3
Granted
451

 
41.76

 
 
Dividend equivalent units granted
29

 
39.26

 
 
Vested
(375
)
 
34.99

 
 
Dividend equivalent units vested
(18
)
 
36.12

 
 
Forfeited
(66
)
 
34.72

 
 
Dividend equivalent units forfeited
(2
)
 
37.31

 
 
Outstanding and nonvested, December 31, 2018 (2)
1,124

 
$
35.46

 
1.2
 
*
Not meaningful
(1)
Included 22,309 RSUs which were granted to foreign employees and which the Company expected to settle in cash. The fair value of these RSUs was not material.
(2)
The weighted average fair value of outstanding RSUs as of the end of each reporting period reflects the adjustment for the special cash dividend.
Schedule of Share-based Compensation, Restricted Stock Award And Unrestricted Stock Award Activity
A summary of activity and weighted average fair values related to the restricted and unrestricted stock awards is as follows (shares in thousands):
 
Shares
 
Weighted Avg.
 Fair Value
 
Weighted Avg. Remaining Contractual Term (in years)
Granted
17

 
$
33.73

 
 
Vested
(17
)
 
33.73

 
 
Outstanding and nonvested, December 31, 2016
—

 
$
—

 
0.0
Granted
52

 
36.48

 
 
Vested
(10
)
 
34.98

 
 
Outstanding and nonvested, December 31, 2017
42

 
$
36.84

 
3.0
Vested
(14
)
 
36.84

 
 
Outstanding and nonvested, December 31, 2018
28

 
$
36.84

 
2.0
Schedule of Nonvested Performance-based Units Activity
A summary of activity and weighted average fair values related to the PSUs is as follows (shares in thousands):
 
Shares
 
Weighted Avg.
 Fair Value
 
Weighted Avg. Remaining Contractual Term (in years)
Outstanding and nonvested, December 31, 2015 (1)
107

 
$
65.50

 
0.6
Granted
295

 
21.26

 
 
Dividend equivalent units granted
10

 
37.50

 
 
Vested
(56
)
 
65.06

 
 
Dividend equivalent units vested
(1
)
 
41.64

 
 
Forfeited
(8
)
 
49.85

 
 
Outstanding and nonvested, December 31, 2016 (1)
347

 
$
27.23

 
1.1
Granted
118

 
31.45

 
 
Dividend equivalent units granted
5

 
39.26

 
 
Vested
(184
)
 
31.22

 
 
Dividend equivalent units vested
(4
)
 
32.50

 
 
Forfeited
(47
)
 
33.73

 
 
Dividend equivalent units forfeited
(6
)
 
40.72

 
 
Adjustment due to the 2017 Special Cash Dividend
24

 
*

 
 
Outstanding and nonvested, December 31, 2017 (1)(2)
253

 
$
22.53

 
1.4
Granted
84

 
41.64

 
 
Dividend equivalent units granted
5

 
39.29

 
 
Vested
(37
)
 
38.67

 
 
Dividend equivalent units vested
(3
)
 
35.20

 
 
Forfeited
(140
)
 
13.25

 
 
Outstanding and nonvested, December 31, 2018 (1)(2)
162

 
$
37.30

 
1.4
 
*
Not meaningful
(1)
Represents shares of PSUs for which performance targets have been established and which are deemed granted under U.S. GAAP.
(2)
The weighted average fair value of outstanding PSUs reflect the adjustment for the respective special cash dividend
Schedule of Unrecognized Compensation Cost, Nonvested Awards
As of December 31, 2018, the Company had not yet recognized compensation cost on nonvested awards as follows (in thousands):
 
Unrecognized Compensation Cost
 
Weighted Average Remaining Recognition Period
(in years)
Nonvested awards
$
33,931

 
2.1