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STOCK-BASED COMPENSATION PLANS (Details 1) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Shares, Outstanding at end of year 1,265,792    
Shares, Exercisable at end of year 706,863    
Weighted Average Exercise Price, Outstanding at end of year $ 22.76    
Weighted Average Exercise Price, Exercisable at end of year $ 21.89    
Weighted Average Remaining Contractual Life (in years), Outstanding 3 years 1 month 20 days    
Stock Options [Member]
      
Shares, Outstanding at beginning of year 1,307,488 1,269,426 1,195,276
Shares, Granted 253,400 235,700 192,000
Shares, Exercised (174,646) (122,463) (113,500)
Shares, Forfeited or expired (120,450) (75,175) (4,350)
Shares, Outstanding at end of year 1,265,792 1,307,488 1,269,426
Shares, Exercisable at end of year 706,863 821,510 848,200
Weighted Average Exercise Price, Outstanding at beginning of year $ 21.76 $ 20.25 $ 18.68
Weighted Average Exercise Price, Granted $ 23.53 $ 24.21 $ 24.49
Weighted Average Exercise Price,Exercised $ 13.17 $ 8.95 $ 10.59
Weighted Average Exercise Price, Forfeited or expired $ 27.37 $ 24.93 $ 26.90
Weighted Average Exercise Price, Outstanding at end of year $ 22.76 $ 21.76 $ 20.25
Weighted Average Exercise Price, Exercisable at end of year $ 21.89 $ 20.16 $ 17.81
Weighted average fair market value of options granted $ 3.68 $ 4.51 $ 4.97
Weighted Average Remaining Contractual Life (in years), Outstanding 3 years 1 month 6 days    
Weighted Average Remaining Contractual Life (in years) Exercisable 1 year 9 months 18 days    
Aggregate Intrinsic Value, Outstanding $ 2,022,000    
Aggregate Intrinsic Value, Exercisable $ 2,010,000