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L. SHARE-BASED COMPENSATION - NARRATIVE (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
plan
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Number of incentive plans | plan 5    
Options Exercisable (as a percent) 25.00%    
Options Expiration Period 10 years    
Unrecognized compensation expense $ 800    
Unrecognized compensation expense recognized period 9 months 18 days    
Minimum      
Vesting period 4 years    
Maximum      
Vesting period 10 years    
Restricted stock units      
Unrecognized compensation expense $ 6,300    
Unrecognized compensation expense recognized period 2 years 10 months 28 days    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding $ 12,128 $ 2,611 $ 238