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Equity Compensation (Tables)
 12 Months Ended
Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan
The amounts of equity-based compensation expense recognized as part of selling, general and administrative expenses were as follows (in thousands):
 
2014
 
2013
 
2012
Non-Qualified stock options
$
3,356

 
$
3,926

 
$
4,304

Restricted stock and restricted stock units
2,270

 
2,031

 
2,241

Performance shares and performance share units
—

 
—

 
—

Total stock-based compensation expense
$
5,626

 
$
5,957

 
$
6,545
Schedule of Unrecognized Compensation Cost, Nonvested Awards
As of December 31, 2014, unrecognized compensation expense related to equity-based compensation arrangements granted under the Company's 2013 Plan and previous plans, which is related to non-vested options and shares, was as follows (in thousands):
 
2014
 
2013
 
2012
Non-Qualified stock options
$
2,600

 
$
8,270

 
$
7,381

Restricted stock and restricted stock units
4,461

 
3,705

 
4,323

Performance shares and performance share units
—

 
—

 
—

Total stock-based compensation expense
$
7,061

 
$
11,975

 
$
11,704
Schedule of Share-based Compensation, Stock Options, Activity
The following table summarizes information about stock option activity for the three years ended 2014, 2013 and 2012:  
 
2014
 
Weighted
Average
Exercise
Price
 
2013
 
Weighted
Average
Exercise
Price
 
2012
 
Weighted
Average
Exercise
Price
Options outstanding at January 1
4,533,782

 
$
23.86

 
4,664,634

 
$
26.21

 
4,455,365

 
$
28.99

Granted
8,977

 
16.71

 
756,700

 
14.47

 
761,892

 
13.44

Exercised
(33,810
)
 
14.16

 
(30,166
)
 
16.94

 
(9,417
)
 
10.70

Canceled
(908,817
)
 
28.57

 
(857,386
)
 
28.63

 
(543,206
)
 
31.52

Options outstanding at December 31
3,600,132

 
$
22.74

 
4,533,782

 
$
23.86

 
4,664,634

 
$
26.21

Options exercise price range at December 31
13.37 to

 
 
 
13.35 to

 
 
 
13.37 to

 
 
 
$
47.80

 
 
 
$
47.80

 
 
 
$
47.80

 
 
Options exercisable at December 31
2,954,082

 
 
 
2,985,175

 
 
 
3,074,275

 
 
Shares available for grant at December 31*
3,654,426

 
 
 
4,460,337

 
 
 
1,248,033

 
 

 ________________________
 *
Shares available for grant as of December 31, 2014 reduced by net restricted stock / unit and performance share / unit award activity of 369,690 shares and 427,244 shares, respectively.
Schedule of Share-based Compensation, Stock Options Outstanding
The following table summarizes information about stock options outstanding at December 31, 2014:
 
Options Outstanding
 
Options Exercisable
Exercise Prices
Number
Outstanding
At 12/31/14
 
Weighted Average
Remaining
Contractual Life Years
 
Weighted Average
Exercise Price
 
Number
Exercisable
At 12/31/14
 
Weighted Average
Exercise Price
$ 13.37 – $15.00
956,736

 
7.8
 
$
13.91

 
415,042

 
$
13.78

$ 15.01 – $25.00
1,464,900

 
4.3
 
22.43

 
1,362,980

 
22.35

$ 25.01 – $35.00
851,471

 
4.5
 
25.73

 
849,035

 
25.71

$ 35.01 – $47.80
327,025

 
0.7
 
42.22

 
327,025

 
42.22

Total
3,600,132

 
5.0
 
$
22.74

 
2,954,082

 
$
24.32
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions:
 
2014
 
2013
 
2012
Expected dividend yield
0.3
%
 
0.4
%
 
0.04
%
Expected stock price volatility
36.8
%
 
38.2
%
 
41.0
%
Risk-free interest rate
1.76
%
 
0.82
%
 
0.94
%
Expected life in years
6.1

 
6.1

 
6.0

Forfeiture percentage
13.0
%
 
9.2
%
 
7.6
%
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
The following table summarizes information about restricted shares and restricted share units (for non-U.S. recipients):
 
2014
Weighted Average Fair Value
 
2013
Weighted Average Fair Value
 
2012
Weighted Average Fair Value
Stock / Units unvested at January 1
264,878

$
16.69

 
260,548

$
19.15

 
249,499

$
23.76

Granted
218,276

19.36

 
114,700

14.49

 
118,200

13.41

Vested
(93,140
)
17.62

 
(97,445
)
20.33

 
(96,520
)
23.59

Canceled
(77,591
)
17.58

 
(12,925
)
19.23

 
(10,631
)
23.36

Stock / Units unvested at December 31
312,423

$
17.91

 
264,878

$
16.69

 
260,548

$
19.15

 
 
 
 
 
 
 
 
 
Share-based Compensation, Performance Shares Award Unvested Activity
The following table summarizes information about performance shares and performance share units (for non-U.S. recipients):
 
2014
 
Weighted Average Fair Value
Shares / Units unvested at January 1
—

 
$
—

Granted
152,800

 
20.05

Vested
—

 
—

Canceled
(31,156
)
 
20.05

Shares / Units unvested at December 31
121,644

 
$
20.05