STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net Income (Loss)	$ 1,741	$ 2,133	$ 5,773	$ 6,827
Amount Included In Net Periodic Benefit Cost [Abstract]
Net actuarial loss	203	107	473	321
Prior service credit	(19)	(13)	(57)	(41)
Transition asset	15	15	45	45
Adjustment to post-retirement benefit plan	0	0	(1,034)	0
Income tax expense	(80)	(45)	228	(130)
Change in post-retirement benefit plan	119	64	(345)	195
Other comprehensive income (loss)	119	64	(345)	195
Comprehensive Income	$ 1,860	$ 2,197	$ 5,428	$ 7,022