OTHER COMPREHENSIVE INCOME (LOSS), Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			$ 493,947	$ 459,725
Other comprehensive income (loss) before reclassifications			673	(642)
Amounts reclassified from accumulated other comprehensive loss			18	16
Other comprehensive income (loss), net of tax	$ 693	$ 176	691	(626)
Balance	555,291	483,879	555,291	483,879
Accumulated Other Comprehensive Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(8,801)	(8,547)
Balance	(8,110)	(9,173)	(8,110)	(9,173)
Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(7,919)	(8,457)
Other comprehensive income (loss) before reclassifications			702	(586)
Amounts reclassified from accumulated other comprehensive loss			0	776
Other comprehensive income (loss), net of tax			702	190
Balance	(7,217)	(8,267)	(7,217)	(8,267)
Derivative Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			0	0
Other comprehensive income (loss) before reclassifications			(163)	0
Amounts reclassified from accumulated other comprehensive loss			18	0
Other comprehensive income (loss), net of tax			(145)	0
Balance	(145)	0	(145)	0
Securities Held-to-Maturity and Transferred Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(760)	(826)
Other comprehensive income (loss) before reclassifications			36	21
Amounts reclassified from accumulated other comprehensive loss			0	0
Other comprehensive income (loss), net of tax			36	21
Balance	(724)	(805)	(724)	(805)
Securities Available-for-Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(122)	736
Other comprehensive income (loss) before reclassifications			98	(77)
Amounts reclassified from accumulated other comprehensive loss			0	(760)
Other comprehensive income (loss), net of tax			98	(837)
Balance	$ (24)	$ (101)	$ (24)	$ (101)