ACCUMULATED OTHER COMPREHENSIVE INCOME (AOCI) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance				$ (7,289)				$ 2,886	$ (7,289)	$ 2,886
Other comprehensive loss (income) before reclassifications									310	(10,073)
Amounts reclassified from AOCI									136	(102)
Net other comprehensive loss (income)									446	(10,175)
Ending balance	(6,843)				(7,289)				(6,843)	(7,289)	2,886
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net gain (loss) on sale of securities available for sale									19	403	(217)
Interest income - U.S. Government agency obligations									2,320	2,012	241
Income tax expense (benefit)	(687)	(875)	(1,047)	(1,111)	(866)	(1,557)	(816)	(483)	(3,720)	(3,722)	714
Net income (loss)	4,066	3,738	3,771	3,720	3,328	3,912	2,769	2,709	15,295	12,718	(1,748)
Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net gain (loss) on sale of securities available for sale									19	403
Interest income - U.S. Government agency obligations									(218)	0
Income tax expense (benefit)									88	(56)
Net income (loss)									(136)	102
Unrealized gains and Losses on available-for-sale securities [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance				(4,095)				10,553	(4,095)	10,553
Other comprehensive loss (income) before reclassifications									6,744	(14,391)
Amounts reclassified from AOCI									(12)	(257)
Net other comprehensive loss (income)									6,732	(14,648)
Ending balance	2,637				(4,095)				2,637	(4,095)
Unrealized Losses on Securities Transferred from Available for Sale to Held to Maturity [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance				0					0
Other comprehensive loss (income) before reclassifications									(1,938)
Amounts reclassified from AOCI									133
Net other comprehensive loss (income)									(1,805)
Ending balance	(1,805)								(1,805)
Pension and postretirement plan items [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance				(3,194)				(7,667)	(3,194)	(7,667)
Other comprehensive loss (income) before reclassifications									(4,496)	4,318
Amounts reclassified from AOCI									15	155
Net other comprehensive loss (income)									(4,481)	4,473
Ending balance	(7,675)				(3,194)				(7,675)	(3,194)
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Employee compensation and benefits									$ (25)	$ (245)