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STOCK COMPENSATION PLANS (Tables)
 6 Months Ended
Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of stock compensation expense and related net tax benefit
The following table presents the total stock compensation expense and the related net tax benefit associated with the Company’s various employee share-based compensation plans for the three and six months ended June 30, 2016 and 2015:
 
 
 
 
 
 
 
 
 
($ in thousands)
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Stock compensation costs
 
$
4,635

 
$
3,698

 
$
9,210

 
$
7,652

Net tax benefit recognized in equity for stock compensation plans
 
$
19

 
$
51

 
$
1,005

 
$
3,196

 
 
 
 
 
 
 
 
 
Summary of activity for time-based and performance-based restricted stock units
The following table presents a summary of the activity for the Company’s time-based and performance-based RSUs for the six months ended June 30, 2016 based on the target amount of awards:
 
 
 
Six Months Ended June 30, 2016
 
Time-Based RSUs
 
Performance-Based RSUs
 
Shares
 
Weighted
Average
Grant-Date Fair Value
 
Shares
 
Weighted
Average
Grant-Date Fair Value
Outstanding at beginning of period
 
933,312

 
$
36.83

 
389,358

 
$
34.21

Granted
 
486,607

 
31.37

 
159,407

 
29.18

Vested
 
(114,824
)
 
25.12

 
(138,019
)
 
25.25

Forfeited
 
(56,581
)
 
35.95

 
—

 
—

Outstanding at end of period
 
1,248,514

 
$
35.82

 
410,746

 
$
35.27