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STOCK-BASED COMPENSATION (Tables)
 12 Months Ended
Dec. 31, 2015
Stockholders' Equity Note [Abstract]  
Fair Value Valuation Assumptions
The estimated fair value of the Company’s PBO was determined using a Monte Carlo model, which incorporated the following assumptions:
 
2015
10-Year Option
 
2014
10-Year Option
 
2014
4.58-Year Option
Grant date
8/12/2015

 
11/14/2014

 
11/14/2014

Expiration date
8/12/2025

 
11/14/2024

 
6/14/2019

Grant date stock price
$
13.06

 
$
19.51

 
$
19.51

Historical volatility
35.16
%
 
35.00
%
 
28.85
%
Risk-free rate (annualized)
2.19
%
 
2.38
%
 
1.5
%
Dividend yield (annualized)
—
%
 
—
%
 
—
%
Summary of ISO Activity
A summary of PBO activity was as follows:
 
Performance-Based Options
 
Weighted-Average Exercise Price Per Share
Outstanding at December 31, 2013


 


Granted
453,333

 
$
19.51

Forfeited


 


Outstanding at December 31, 2014
453,333

 
$
19.51

Granted
75,000

 
$
13.06

Forfeited
(75,000
)
 
$
13.06

Outstanding at December 31, 2015
453,333

 
$
19.51


Of the PBO outstanding, 285,714 are exercisable for up to 4 years, 7 months from the grant date and 167,619 are exercisable for up to 10 years from the grant date.

 
Performance-Based Options
 
Weighted-Average Exercise Price Per Share
 
Weighted-Average Remaining Contractual Term (In Years)
 
Aggregate Intrinsic Value
Vested at December 31, 2013


 
 
 
 
 
 
Vested
12,593

 
 
 
 
 
 
Forfeited


 
 
 
 
 
 
Vested at December 31, 2014
12,593

 
$
19.51

 
6.5
 
—

Vested
155,278

 
 
 
 
 
 
Forfeited
(4,167
)
 
 
 
 
 
 
Vested at December 31, 2015
163,704

 
$
19.51

 
5.5
 
—
Summary of RSU and RSA Activity
A summary of RSU activity was as follows:
 
RSU Shares
 
Weighted-Average Grant Date Fair Value Per Share
Outstanding and unvested at December 31, 2012
467,716

 
$
30.43

Granted
15,435

 
$
22.67

Vested
(13,716
)
 
$
21.87

Forfeited


 


Outstanding and unvested at December 31, 2013
469,435

 
$
30.43

Granted
142,131

 
$
19.81

Vested
(469,435
)
 
$
30.43

Forfeited


 


Outstanding and unvested at December 31, 2014
142,131

 
$
19.81

Granted
23,300

 
$
15.68

Vested
(45,753
)
 
$
20.43

Forfeited
(11,020
)
 
$
15.72

Outstanding and unvested at December 31, 2015
108,658

 
$
19.07
Schedule of Share-based Compensation, Stock Appreciation Rights Award Activity
A summary of SAR activity is as follows:
 
SAR Shares
 
Weighted Average Exercise Price
 
Weighted Average Contractual Term Remaining (Years)
Outstanding and exercisable at December 31, 2012
1,812,079

 
$
36.16

 
3.5
Expired
(195,454
)
 
$
33.76

 
 
Outstanding and exercisable at December 31, 2013
1,616,625

 
$
36.45

 
2.5
Expired
(20,000
)
 
$
33.76

 
 
Outstanding and exercisable at December 31, 2014
1,596,625

 
$
36.49

 
1.5
Expired
(1,110,155
)
 
$
33.76

 
 
Outstanding and exercisable at December 31, 2015
486,470

 
$
42.71

 
1.5