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Share-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Activity for Stock Options Granted
The following table summarizes the activity for stock options granted by the Company:
 
 
Shares
 
Weighted-Average Exercise Price Per Share
 
Weighted-Average Remaining Contractual Term (in years)
 
Aggregate Intrinsic Value (in $000s)
Outstanding at January 1, 2014
 
2,726,553

 
$
23.51

 
7.22
 
$
32,785

Granted
 
67,507

 
29.11

 
 
 
 
Exercised
 
(303,449
)
 
18.12

 
 
 
3,468

Forfeited or expired
 
(126,883
)
 
31.24

 
 
 
 
Outstanding at December 31, 2014
 
2,363,728

 
23.95

 
6.34
 
1,223

Granted
 
789,210

 
16.39

 
 
 
 
Exercised
 
(15,458
)
 
12.88

 
 
 
150

Forfeited or expired
 
(127,247
)
 
27.66

 
 
 
 
Outstanding at December 31, 2015
 
3,010,233

 
21.87

 
5.56
 
443

Granted
 
1,272,293

 
5.69

 
 
 
 
Exercised
 
(64,220
)
 
2.89

 
 
 
200

Forfeited or expired
 
(311,309
)
 
16.51

 
 
 
 
Outstanding at December 31, 2016
 
3,906,997

 
17.34

 
5.74
 
1,809

 
 
 
 
 
 
 
 
 
Exercisable at December 31, 2016
 
2,471,233

 
22.69

 
4.42
 
119

Options expected to vest as of December 31, 2016
 
1,355,723

 
8.14

 
7.95
 
1,577
Schedule of Weighted-Average Assumptions Used to Value Options
The weighted-average assumptions the Company used to value options are shown below.
 
 
For the Years Ended December 31,
 
 
2016
 
2015
 
2014
Risk-free interest rate
 
0.99
%
 
1.07
%
 
1.17
%
Dividend yield
 
—
%
 
—
%
 
—
%
Expected life (years)
 
4.84

 
4.00

 
4.00

Volatility
 
56.96
%
 
50.00
%
 
42.56
%
Forfeiture rate
 
5.85
%
 
3.50
%
 
2.20
%
Schedule of Activity for Non-Vested Awards Granted
The following table summarizes the activity for non-vested awards granted by the Company:
 
 
Shares
 
Weighted-Average Grant-Date Fair Value Per Share
 
Weighted-Average Contractual Term (in years)
 
Aggregate Intrinsic Value (in $000s)
Outstanding at January 1, 2014
 
308,426

 
$
25.65

 
1.90
 
$
10,906

Granted
 
738,164

 
32.46

 
 
 
 
Vested and settled
 
(30,898
)
 
29.45

 
 
 
910

Forfeited
 
(94,133
)
 
8.48

 
 
 
 
Outstanding at December 31,2014
 
921,559

 
30.42

 
1.84
 
15,215

Granted
 
1,046,362

 
17.62

 
 
 
 
Vested and settled
 
(303,166
)
 
24.31

 
 
 
4,132

Forfeited
 
(165,610
)
 
23.96

 
 
 
 
Outstanding at December 31, 2015
 
1,499,145

 
23.42

 
1.88
 
21,318

Granted (1)
 
1,128,522

 
3.28

 
 
 
 
Vested and settled
 
(894,900
)
 
8.88

 
 
 
4,217

Forfeited
 
(322,557
)
 
22.64

 
 
 
 
Outstanding at December 31, 2016
 
1,410,210

 
16.71

 
4.68
 
6,698

Non-vested shares expected to vest as of December 31, 2016
 
1,287,348

 
16.46

 
4.88
 
6,115


__________
(1)
Excludes 192,024 performance shares legally granted on November 3, 2016 that have not met the grant date requirements in accordance with GAAP, as the performance target condition had not been determined at December 31, 2016. The performance target for these performance shares is based on the 2017 Annual Business Plan as approved by the Board, which was approved subsequent to the year end.
Schedule of Weighted-Average Assumptions Used to Value Performance-Share Awards
The weighted-average assumptions the Company used to value performance-share awards are shown below. As discussed above, the table excludes the 192,024 performance shares legally granted in 2016 that have not met the grant-date requirements as required by GAAP as the performance target condition had not been determined at December 31, 2016.
 
 
For the Years Ended December 31,
 
 
2015
 
2014
Risk-free interest rate
 
0.75
%
 
0.82
%
Simulation period (years)
 
2.72

 
2.76

Volatility
 
52.30
%
 
46.58
%
Beginning TSR price
 
$
16.57

 
$
28.09

Forfeiture rate
 
3.50
%
 
2.20
%