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STOCK COMPENSATION PLANS (Details) - USD ($)
$ in Thousands, shares in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Incentive shares available to be issued 3.0    
Compensation expense related to RSAs and RSUs $ 16,502 $ 13,883 $ 13,531
Net tax benefit recognized in equity for stock compensation plans $ 3,291 $ 6,513 $ 5,522
1998 Stock Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock, shares authorized (in shares) 11.0