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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2014
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:
 
2014
 
2013
 
2012
Weighted average fair value of stock options granted
$
3.79

 
$
12.60

 
$
15.77

Volatility
50.93
%
 
76.74
%
 
70.56
%
Expected life in years
3.9

 
5.0

 
5.5

Risk-free interest rate
1.25
%
 
0.84
%
 
0.89
%
Dividend yield
—

 
—

 
—
Schedule of Share-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, 2014, 2013, and 2012:
 
Stock Options
 
SARs
 
Shares
 
Weighted
Average
Exercise
Price
 
Shares
 
Weighted
Average
Exercise
Price
Outstanding at December 31, 2011
321,607

 
$
24.60

 
107,639

 
$
13.46

Granted
151,102

 
26.97

 
—

 
—

Exercised
(40,173
)
 
11.84

 
(34,385
)
 
12.73

Canceled/forfeited
(62,536
)
 
29.22

 
(4,389
)
 
15.40

Outstanding at December 31, 2012
370,000

 
30.20

 
68,865

 
13.83

Granted
190,452

 
20.41

 
—

 
—

Exercised
(13,027
)
 
10.77

 
(6,617
)
 
13.14

Canceled/forfeited
(131,855
)
 
29.30

 
(12,039
)
 
15.40

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
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range
 
 
Options Outstanding
 
Options Exercisable
Range of
Exercise Price
 
Number
Outstanding
 
Weighted Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Life (Years)
 
Number
Exercisable
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual Life (Years)
$ 0.00-$10.00
 
284,866

 
$
9.34

 
9.04
 
11,034

 
$
10.00

 
4.09
$10.00-$20.00
 
121,540

 
15.51

 
8.43
 
33,646

 
17.33

 
8.11
$20.00-$30.00
 
176,777

 
25.68

 
6.88
 
107,546

 
26.37

 
6.27
$30.00-$40.00
 
9,566

 
38.25

 
2.44
 
9,566

 
38.25

 
2.44
$40.00-$50.00
 
3,336

 
48.50

 
3.03
 
3,336

 
48.50

 
3.03
$50.00-$60.00
 
2,261

 
51.40

 
1.14
 
2,261

 
51.40

 
1.14
 
 
598,346

 
$
16.26

 
 
 
167,389

 
$
24.93

 
 
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
The following table summarizes restricted stock and restricted stock units activity for the years ended December 31, 2014, 2013, and 2012:
 
Restricted Stock
 
Restricted Stock Units
 
Number of
Shares
 
Weighted
Average
Grant Date
Fair Value
 
Number of
Units
 
Weighted Average
Fair Value
Outstanding at December 31, 2011
173,509

 
11.37

 
45,518

 
27.32

Granted
230,096

 
26.40

 
—

 
—

Vested
(95,336
)
 
23.15

 
(31,456
)
 
25.92

Cancelled/Forfeited
(68,571
)
 
27.43

 
(2,651
)
 
24.60

Outstanding at December 31, 2012
239,698

 
25.38

 
11,411

 
24.14

Granted
573,467

 
15.38

 
—

 
—

Vested
(90,963
)
 
26.83

 
(11,411
)
 
22.74

Cancelled/Forfeited
(109,116
)
 
23.30

 
—

 
—

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

 
—

 
$
—
Schedule of Nonvested Performance-based Units Activity
The following table summarizes performance shares and performance units’ activity for the years ended December 31, 2014, 2013, and 2012:
 
Performance Shares
 
Performance Units
 
Number of
Shares
 
Weighted
Average
Grant Date
Fair Value
 
Number of
Units
 
Weighted Average
Fair Value
Outstanding at December 31, 2011
105,929

 
$
16.29

 
84,539

 
$
35.41

Granted
145,508

 
25.78

 
32,498

 
—

Vested
(111,703
)
 
7.96

 
(74,845
)
 
31.17

Cancelled/Forfeited
(30,575
)
 
42.11

 
(7,953
)
 
49.20

Outstanding at December 31, 2012
109,159

 
26.92

 
34,239

 
39.78

Granted
173,773

 
23.35

 
34,239

 
38.02

Vested
(4,160
)
 
30.97

 
(68,478
)
 
38.02

Cancelled/Forfeited
(68,377
)
 
34.49

 
—

 
—

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

 
—

 
$
—