RETIREMENT AND POSTRETIREMENT PLANS (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Postretirement Plans [Member]
          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Service Cost $ 39 $ 33 $ 117 $ 99  
Defined Benefit Plan, Interest Cost 90 86 270 258  
Defined Benefit Plan, Expected Return on Plan Assets 0 0 0 0  
Defined Benefit Plan, Amortization of Transition Obligations (Assets) 0 0 0 0  
Defined Benefit Plan, Amortization of Gains (Losses) 75 29 225 87  
Defined Benefit Plan, Net Periodic Benefit Cost, Total 204 148 612 444  
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year         196
Defined Benefit Plan, Contributions by Employer     107    
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year 89   89    
BMP, Employee And Outside Director Retirement Plans [Member]
          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Service Cost 0 0 0 0  
Defined Benefit Plan, Interest Cost 306 339 918 1,017  
Defined Benefit Plan, Expected Return on Plan Assets (363) (361) (1,089) (1,083)  
Defined Benefit Plan, Amortization of Transition Obligations (Assets) 0 0 0 0  
Defined Benefit Plan, Amortization of Gains (Losses) 541 312 1,623 936  
Defined Benefit Plan, Net Periodic Benefit Cost, Total 484 290 1,452 870  
Employee Retirement Plan [Member]
          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year         51
Defined Benefit Plan, Contributions by Employer     40    
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year 11   11    
BMP Retirement Plan [Member]
          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year         435
Outside Director Retirement Plan [Member]
          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year         213
Defined Benefit Plan, Contributions by Employer     114    
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year $ 45   $ 45