Quarterly report pursuant to Section 13 or 15(d)

STOCK BASED AND DEFERRED COMPENSATION - Summary of Compensation Expense and Stock Award Activity (Details)

v3.8.0.1
STOCK BASED AND DEFERRED COMPENSATION - Summary of Compensation Expense and Stock Award Activity (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Summary of compensation expense and stock award activity    
Stock-based compensation expense (in dollars) $ 5,209 $ 3,295
Restricted Stock [Member]    
Summary of compensation expense and stock award activity    
Restricted stock awards vested (includes performance-based awards) (in shares) 301,575 283,574
Non-vested shares [Member]    
Summary of compensation expense and stock award activity    
Non-vested shares granted (in shares) 306,164 416,500
Performance-based non-vested shares [Member]    
Summary of compensation expense and stock award activity    
Non-vested shares granted (in shares) 157,637 154,120