STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income	$ 1,911	$ 2,321	$ 3,984	$ 3,947
Designated interest rate swaps:
Changes in fair value	5	65	(16)	60
Income tax (expense) benefit	(2)	(26)	6	(24)
Unrealized holding gain (loss) on designated interest rate swaps	3	39	(10)	36
Amounts Included In Net Periodic Benefit Cost
Amortization of net actuarial loss	98	120	196	240
Amortization of prior service credit	(236)	(236)	(472)	(472)
Income tax benefit	55	46	110	92
Change in post-retirement benefit plan	(83)	(70)	(166)	(140)
Other comprehensive loss	(80)	(31)	(176)	(104)
Comprehensive income	$ 1,831	$ 2,290	$ 3,808	$ 3,843