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STOCK-BASED COMPENSATION (Other Awards) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Service Based      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards issued to employees of businesses acquired 113,614 523,220 15,524
Performance-Based Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards issued to employees of businesses acquired 14,000 387,058  
Vesting percentage 33.30%    
2012 Directors Plan | Restricted stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock issued 5,295    
Restricted stock issued, grant date fair value $ 375    
Unrecognized compensation cost related to non-vested awards issued $ 262    
Unrecognized compensation cost, period for recognition 1 year 2 months 24 days    
2012 & 2015 Plans | Service Based      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost related to non-vested awards issued $ 11,090    
Unrecognized compensation cost, period for recognition 1 year 5 months 14 days    
2012 & 2015 Plans | Performance-Based Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost related to non-vested awards issued $ 12,679    
Unrecognized compensation cost, period for recognition 1 year 3 months 15 days    
Service Period | 2012 & 2015 Plans | Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost related to non-vested awards issued $ 5,691    
Unrecognized compensation cost, period for recognition 2 years 1 month 1 day    
Deferred compensation, shares issued 84,000    
Deferred compensation arrangements, grant date fair value $ 5,492    
Service Period | 2015 Plan | Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards issued to employees of businesses acquired 24,319    
Awards issued to employees of businesses acquired, grant date fair value $ 1,789    
Performance Targets | 2015 Plan | Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share vesting term (in years) 3 years    
Vesting percentage 33.30%    
Performance Targets | 2012 Plan | Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards issued to employees of businesses acquired, grant date fair value $ 983