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Stock Compensation Plans (Tables)
 12 Months Ended
Dec. 31, 2016
Share-based Compensation [Abstract]  
Stock Compensation Expense by Plan Type
Our stock compensation expense for the three years ended December 31, 2016, is presented below ($000's omitted):
 
2016
 
2015
 
2014
Stock options
$
—

 
$
37

 
$
121

Restricted shares (including RSUs and performance shares)
18,626

 
16,852

 
13,690

Long-term incentive plans
3,602

 
7,863

 
15,481

 
$
22,228

 
$
24,752

 
$
29,292
Stock Option Activity Rollforward
A summary of stock option activity for the three years ended December 31, 2016, is presented below (000’s omitted, except per share data):
 
2016
 
2015
 
2014
 
Shares
 
Weighted-
Average
Per Share
Exercise Price
 
Shares
 
Weighted-
Average
Per Share
Exercise Price
 
Shares
 
Weighted-
Average
Per Share
Exercise Price
Outstanding, beginning of year
6,040

 
$
19

 
9,370

 
$
23

 
12,887

 
$
23

Granted
—

 
—

 
—

 
—

 
—

 
—

Exercised
(498
)
 
12

 
(904
)
 
12

 
(1,422
)
 
11

Forfeited
(1,919
)
 
34

 
(2,426
)
 
37

 
(2,095
)
 
29

Outstanding, end of year
3,623

 
$
12

 
6,040

 
$
19

 
9,370

 
$
23

Options exercisable at year end
3,623

 
$
12

 
6,040

 
$
19

 
9,265

 
$
23

Weighted-average per share fair value of
       options granted during the year
$
—

 
 
 
$
—

 
 
 
$
—

 
 
Stock Options Weighted-average Remaining Contractual Lives
The following table summarizes information about our options outstanding at December 31, 2016: 
 
Options Outstanding
 
Options Exercisable
 
Number
Outstanding
(000's omitted)
 
Weighted-
Average
Remaining
Contract Life
(in years)
 
Weighted-
Average
Per Share
Exercise Price
 
Number
Exercisable
(000's omitted)
 
Weighted-
Average Per
Share
Exercise Price
$0.01 to $10.00
320

 
3.8
 
$
8

 
320

 
$
8

$10.01 to $20.00
3,205

 
2.5
 
12

 
3,205

 
12

$20.01 to $30.00
82

 
0.4
 
27

 
82

 
27

$30.01 to $40.00
16

 
0.1
 
35

 
16

 
35

 
3,623

 
2.6
 
$
12

 
3,623

 
$
12
Restricted Stock, RSUs, and Performance Shares Activity Rollforward
A summary of restricted share activity, including RSUs and performance shares, for the three years ended December 31, 2016, is presented below (000’s omitted, except per share data):
 
 
2016
 
2015
 
2014
 
Shares
 
Weighted-
Average
Per Share
Grant Date
Fair Value
 
Shares
 
Weighted-
Average
Per Share
Grant Date
Fair Value
 
Shares
 
Weighted-
Average
Per Share
Grant Date
Fair Value
Outstanding, beginning of
       year
2,576

 
$
18

 
2,890

 
$
15

 
3,211

 
$
11

Granted
1,853

 
17

 
932

 
22

 
974

 
19

Distributed
(546
)
 
20

 
(1,090
)
 
10

 
(1,019
)
 
10

Forfeited
(909
)
 
12

 
(156
)
 
19

 
(276
)
 
15

Outstanding, end of year
2,974

 
$
19

 
2,576

 
$
18

 
2,890

 
$
15

Vested, end of year
123

 
$
15

 
89

 
$
14

 
75

 
$
13