RETIREMENT AND POSTRETIREMENT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended			12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015		Sep. 30, 2014	Dec. 31, 2015
Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 0	$ 10	$ 9		$ 30
Defined Benefit Plan, Interest Cost	18	58	556		174
Defined Benefit Plan, Expected Return on Plan Assets	0	0	0		0
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments			(3,394)	[1]	0
Amortization of unrealized loss	(2)	0	(27)		0
Net periodic cost	16	68	(2,856)		204
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year						$ 145
Defined Benefit Plan, Contributions by Employer	25		56
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	344	338	749		1,014
Defined Benefit Plan, Expected Return on Plan Assets	(414)	(444)	(1,242)		(1,332)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments			0		0
Amortization of unrealized loss	480	261	1,257		783
Net periodic cost	410	$ 155	764		$ 465
Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year						14
Defined Benefit Plan, Contributions by Employer	7		12
BMP Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year						604
Defined Benefit Plan, Contributions by Employer	0		0
Outside Director Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year						$ 188
Defined Benefit Plan, Contributions by Employer	$ 41		$ 130

[1] (1) The Postretirement Plan was amended effective March 31, 2015, whereby future retirees will not be eligible to participate in the plan. This plan amendment resulted in a curtailment gain.