RETIREMENT AND POSTRETIREMENT PLANS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 39	$ 33	$ 78	$ 67
Defined Benefit Plan, Interest Cost	90	86	180	173
Defined Benefit Plan, Expected Return on Plan Assets	0	0		0
Defined Benefit Plan, Amortization of Transition Obligations (Assets)	0	0		0
Defined Benefit Plan, Amortization of Gains (Losses)	75	29	150	58
Defined Benefit Plan, Net Periodic Benefit Cost, Total	204	148	408	298
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year					196
Defined Benefit Plan, Contributions by Employer			62
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	134		134
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	612	679
Defined Benefit Plan, Expected Return on Plan Assets	(363)	(361)	(726)	(721)
Defined Benefit Plan, Amortization of Transition Obligations (Assets)	0	0	0	0
Defined Benefit Plan, Amortization of Gains (Losses)	541	312	1,082	623
Defined Benefit Plan, Net Periodic Benefit Cost, Total	484	290	968	581
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			28
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	23		23
BMP Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year					435
Defined Benefit Plan, Contributions by Employer			0
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	0		0
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			69
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	$ 91		$ 91