Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Condensed Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 2,200	$ 1,444	$ 4,618	$ 3,333
Other comprehensive income (loss):
Accumulated income	36	15	108	44
Effect of income taxes	(14)	(5)	(40)	(15)
Prior service cost	15	15	45	45
Effect of income taxes	(5)	(6)	(16)	(16)
Unrealized gains on security investments	21		21
Effect of income taxes	(8)		(8)
Other comprehensive income	45	19	110	58
Comprehensive income	$ 2,245	$ 1,463	$ 4,728	$ 3,391