Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Document Fiscal Year Focus			2015
Net income	$ 2,484,000	$ 2,428,000	$ 9,719,000	$ 7,068,000
Interest rate swaps:
Adjustment for amortization of losses included in net income	6,000	6,000	16,000	16,000
Income tax expense	2,000	2,000	5,000	6,000
Post retirement benefit plan adjustments:
Net actuarial loss	42,000	12,000	126,000	36,000
Prior service costs	(124,000)	(124,000)	(372,000)	(372,000)
Income tax benefit	24,000	35,000	73,000	105,000
Comprehensive income	$ 2,430,000	$ 2,355,000	$ 9,557,000	6,847,000
Derivative [Member]
Interest rate swaps:
Income tax expense				6,000
Other Postretirement Benefit Plans, Defined Benefit [Member]
Post retirement benefit plan adjustments:
Income tax benefit				$ 105,000