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Stock Compensation Plans
 9 Months Ended
Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock Compensation Plans
Stock Compensation Plans:
The Company has various plans under which its officers, senior management, other key employees and directors may be granted equity-based awards. Equity awards outstanding under the plans include PRS, purchased restricted stock units, restricted stock units ("RSUs"), stock options, SSARs and Long-Term Incentive Plan awards; liability-based awards outstanding under the plans are cash-settled RSUs.
Stock-based compensation expense and related tax benefits were as follows: 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(DOLLARS IN THOUSANDS)
2015
 
2014
 
2015
 
2014
Equity-based awards
$
5,495

 
$
5,593

 
$
18,355

 
$
19,627

Liability-based awards
782

 
452

 
3,355

 
3,216

Total stock-based compensation expense
6,277

 
6,045

 
21,710

 
22,843

Less: tax benefit
(1,914
)
 
(1,899
)
 
(6,326
)
 
(6,970
)
Total stock-based compensation expense, after tax
$
4,363

 
$
4,146

 
$
15,384

 
$
15,873


On May 6, 2015, the shareholders of the Company approved the 2015 Stock Award and Incentive Plan (the "2015 Plan"). The 2015 Plan replaces the 2010 Stock Award and Incentive Plan (the “2010 Plan”). The total number of shares authorized for issuance under the Plan is 1,500,000 shares plus shares that remained available for issuance under the 2010 Plan as of May 6, 2015 and any shares subject to outstanding awards under the 2010 Plan that are cancelled, forfeited or expire.