Annual report pursuant to Section 13 and 15(d)

STOCK BASED AND DEFERRED COMPENSATION - Summary of Nonvested (Restricted) Shares and Units Activity (Details)

v3.6.0.2
STOCK BASED AND DEFERRED COMPENSATION - Summary of Nonvested (Restricted) Shares and Units Activity (Details) - $ / shares
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Nonvested Restricted Share Activity (time-based) [Member]      
Nonvested Restricted Share Activity (time-based and performance-based), Number of Shares [Roll Forward]      
Outstanding at beginning of year (in shares) 883,707 903,441 883,895
Granted (in shares) 499,865 434,387 374,683
Vested (Earned/Released) (in shares) (305,359) (318,651) (256,137)
Forfeited (in shares) [1] (115,910) (135,470) (99,000)
Outstanding at end of year (in shares) 962,303 883,707 903,441
Nonvested Restricted Share Activity (time-based and performance-based), Weighted Average Grant Date Fair Value [Roll Forward]      
Outstanding at beginning of year (in dollars per share) $ 40.75 $ 37.51 $ 32.22
Granted (in dollars per share) 31.60 40.48 45.23
Vested (Earned/Released) (in dollars per share) 30.87 41.14 45.34
Forfeited (in dollars per share) [1] 36.79 40.53 38.77
Outstanding at end of year (in dollars per share) $ 37.00 $ 40.75 $ 37.51
Nonvested Restricted Share Activity (performance- based) [Member]      
Nonvested Restricted Share Activity (time-based and performance-based), Number of Shares [Roll Forward]      
Outstanding at beginning of year (in shares) 180,770 170,833 175,000
Granted (in shares) 66,698 66,187 52,083
Vested (Earned/Released) (in shares) (41,665) (56,250) (56,250)
Forfeited (in shares) [1] (20,835) 0 0
Outstanding at end of year (in shares) 184,968 180,770 170,833
Nonvested Restricted Share Activity (time-based and performance-based), Weighted Average Grant Date Fair Value [Roll Forward]      
Outstanding at beginning of year (in dollars per share) $ 42.93 $ 35.43 $ 30.10
Granted (in dollars per share) 34.39 41.17 45.60
Vested (Earned/Released) (in dollars per share) 31.02 40.34 45.56
Forfeited (in dollars per share) [1] 42.56    
Outstanding at end of year (in dollars per share) $ 34.84 $ 42.93 $ 35.43
[1] Forfeitures on time-based nonvested shares are a result of terminations of employment, while forfeitures on performance-based nonvested shares are a result of failing to attain certain goals as outlined in our executive officers' compensation agreements.