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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following table sets forth the weighted average fair value of stock options and the assumptions used to estimate the fair value of the stock options using the Black-Scholes option valuation model:
 
2016
 
2015
 
2014
Weighted average fair value of stock options granted
$
1.06

 
$
2.65

 
$
3.79

Volatility
61.75
%
 
55.71
%
 
50.93
%
Expected life in years
3.99

 
4.75

 
3.92

Risk-free interest rate
1.50
%
 
1.51
%
 
1.25
%
Dividend yield
—

 
—

 
—
Schedule of Stock-based Compensation, Stock Options and Stock Appreciation Rights Award Activity
The following table summarizes stock option and SAR activity for the years ended December 31, 2016, 2015, and 2014:
 
Stock Options
 
SARs
 
Shares
 
Weighted
Average
Exercise
Price
 
Shares
 
Weighted
Average
Exercise
Price
Outstanding at December 31, 2013
415,570

 
$
27.36

 
50,209

 
$
14.15

Granted
415,172

 
9.45

 
—

 
—

Canceled/forfeited
(232,396
)
 
23.94

 
(3,637
)
 
15.40

Outstanding at December 31, 2014
598,346

 
16.26

 
46,572

 
14.06

Granted
310,028

 
5.57

 
—

 
—

Canceled/forfeited
(238,365
)
 
12.69

 
—

 
—

Outstanding at December 31, 2015
670,009

 
12.58

 
46,572

 
14.06

Granted
183,251

 
2.19

 
—

 
—

Exercised
(170,897
)
 
7.81

 
—

 
—

Canceled/forfeited
(25,752
)
 
16.76

 
(4,420
)
 
13.31

Outstanding at December 31, 2016
656,611

 
$
10.76

 
42,152

 
$
14.14
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range
Range of
Exercise Price
Number
Outstanding
 
Weighted Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Life (Years)
 
Aggregate Intrinsic Value (in thousands)
$ 0.00-$10.00
455,578

 
$
5.32

 
8.19
 
 
$10.00-$20.00
52,616

 
13.33

 
6.64
 
 
$20.00-$30.00
141,947

 
25.73

 
5.26
 
 
$30.00-$40.00
3,134

 
39.90

 
0.22
 
 
$40.00-$50.00
3,336

 
48.50

 
1.03
 
 
Outstanding
656,611

 
$
10.76

 
7.36
 
$
1,753

Vested and expected to vest
618,870

 
$
11.20

 
7.27
 
$
1,555

Exercisable
292,524

 
$
18.31

 
5.97
 
$
118
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
The following table summarizes restricted stock activity for the years ended December 31, 2016, 2015, and 2014:
 
Restricted Stock
 
Number of
Shares
 
Weighted
Average
Grant Date
Fair Value
Outstanding at December 31, 2013
613,086

 
$
16.68

Granted
695,897

 
9.83

Vested
(234,103
)
 
17.16

Cancelled/Forfeited
(172,881
)
 
11.87

Outstanding at December 31, 2014
901,999

 
12.19

Granted
1,180,384

 
5.49

Vested
(317,122
)
 
13.38

Cancelled/Forfeited
(257,849
)
 
7.59

Outstanding at December 31, 2015
1,507,412

 
7.49

Granted
1,768,746

 
3.72

Vested
(681,829
)
 
8.51

Cancelled/Forfeited
(160,414
)
 
7.16

Outstanding at December 31, 2016
2,433,915

 
$
4.48
Share-based Compensation, Performance Shares Award Outstanding Activity
The following table summarizes performance shares activity for the years ended December 31, 2016, 2015, and 2014:
 
Performance Shares
 
Number of
Shares
 
Weighted
Average
Grant Date
Fair Value
Outstanding at December 31, 2013
210,395

 
$
28.04

Granted
358,398

 
12.21

Vested
(34,611
)
 
27.18

Cancelled/Forfeited
(17,352
)
 
27.15

Outstanding at December 31, 2014
516,830

 
17.61

Granted
809,293

 
6.97

Cancelled/Forfeited
(190,988
)
 
15.62

Outstanding at December 31, 2015
1,135,135

 
10.35

Granted
1,437,077

 
1.79

Cancelled/Forfeited
(199,580
)
 
17.98

Outstanding at December 31, 2016
2,372,632

 
$
4.53