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Share-Based Compensation Level 3 (Tables)
 12 Months Ended
Dec. 31, 2015
Share-based Compensation [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The fair values of our stock options are calculated using the following weighted average assumptions, based on the methods described above for the years ended December 31, 2015, 2014, and 2013:
 
 
Years Ended December 31,
Assumptions
 
2015
 
2014
 
2013
Dividend yield
 
1.8
%
 
1.8
%
 
1.9
%
Expected volatility
 
23.3
%
 
27.1
%
 
35.2
%
Risk-free interest rate
 
1.3
%
 
1.1
%
 
0.7
%
Expected holding period (years)
 
4.0

 
4.0

 
4.0
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
The following table summarizes certain information with respect to stock option and restricted share compensation for 2015, 2014, and 2013, as included in our Consolidated Statement of Operations for those respective periods:
 
December 31,
 
2015
 
2014
 
2013
 
(In thousands)
Total pretax employee share-based compensation expense included in net income
$
13,843

 
$
13,127

 
$
11,925

Income tax benefit related to share-based compensation included in net income
$
5,068

 
$
7,368

 
$
4,689
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
The following table sets forth stock option activity for the year ended December 31, 2015:
(Shares reported in whole numbers and not in thousands)
 
Options
 
Weighted-Average
Exercise Price
Outstanding at December 31, 2014
12,107,106

 
$
11.63

Granted
2,036,010

 
$
23.00

Exercised
(3,049,099
)
 
$
10.53

Forfeited and other
(46,097
)
 
$
20.21

Outstanding at December 31, 2015
11,047,920

 
$
13.98

Exercisable at December 31, 2015
6,917,973

 
$
10.56
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]
Set forth below is certain information related to stock options outstanding and exercisable at December 31, 2015:
(Shares reported in whole numbers and not in thousands)
 
 
Options Outstanding
 
Options Exercisable
 
 
Number
Outstanding at
December 31,
 
Weighted-Average Remaining Contractual Life
 
Weighted-
Average
 
Number
Exercisable at
December 31,
 
Weighted-
Average
Range of Exercise Price
 
2015
 
(in years)
 
Exercise Price
 
2015
 
Exercise Price
$0.00 — 5.00
 
981,087

 
1.1
 
$
4.19

 
981,087

 
$
4.19

$5.01 — 10.00
 
2,523,076

 
2.6
 
$
8.43

 
2,523,076

 
$
8.43

$10.01 — 15.00
 
1,579,044

 
3.9
 
$
11.19

 
1,579,044

 
$
11.19

$15.01 — 20.00
 
3,959,863

 
5.7
 
$
16.48

 
1,771,466

 
$
16.11

$20.01 — 25.00
 
2,004,850

 
7.1
 
$
23.00

 
63,300

 
$
23.00

$0.00 — 25.00
 
11,047,920

 
4.6
 
$
13.98

 
6,917,973

 
$
10.56
Other Information Pertaining to Stock Option Activity [Table Text Block]
Other information pertaining to option activity during the years ended December 31 is as follows:
 
2015
 
2014
 
2013
Weighted average grant-date fair value of stock options granted
$
3.79

 
$
3.34

 
$
3.68

Total fair value of stock options vested (in thousands)
$
7,973

 
$
6,814

 
$
5,997

Total intrinsic value of stock options exercised (in thousands)
$
52,513

 
$
42,048

 
$
8,855
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
Restricted share activity was as follows:
(Shares reported in whole numbers)
 
Restricted
Shares
 
Weighted-Average
Grant-Date
Fair Value
Nonvested restricted shares at December 31, 2014
1,319,260

 
$
13.39

Granted
253,791

 
$
23.00

Vested
(990,558
)
 
$
12.37

Forfeited and other
(8,754
)
 
$
19.83

Nonvested restricted shares at December 31, 2015
573,739

 
$
19.32