COMPREHENSIVE INCOME - Components of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accumulated other comprehensive income (loss)
Beginning balance	$ (2,642)	$ (2,961)
Other comprehensive loss before reclassification	(367)	485
Amounts reclassified from AOCI	76	(166)
Net current period OCI	(291)	319
Ending balance	(2,933)	(2,642)
Available-for-sale securities, Unrealized holding gains
Accumulated other comprehensive income (loss)
Beginning balance	(406)	(1,476)
Other comprehensive loss before reclassification	121	1,318
Amounts reclassified from AOCI	(78)	(248)
Net current period OCI	43	1,070
Ending balance	(363)	(406)
Defined benefit pension plan items, Change in defined benefit pension plan
Accumulated other comprehensive income (loss)
Beginning balance	(2,236)	(1,485)
Other comprehensive loss before reclassification	(488)	(833)
Amounts reclassified from AOCI	154	82
Net current period OCI	(334)	(751)
Ending balance	$ (2,570)	$ (2,236)