Benefit Plans (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of the status of stock option plans
Outstanding at beginning of year, shares	587,342	463,642
Outstanding at beginning of year, weighted-average exercise price	$ 4.68	$ 5.84
Granted, shares	0	161,538
Granted, weighted-average exercise price	$ 0.00	$ 2.14	$ 2.51
Exercised, shares	0	0	0
Exercised, weighted-average exercise price	$ 0.00	$ 0.00
Forfeited, shares	(5,454)	(29,338)
Forfeited, weighted-average exercise price	$ 10.63	$ 7.03
Expired, shares	0	(8,500)
Expired, weighted-average exercise price	$ 0.00	$ 11.93
Outstanding at end of year, shares	581,888	587,342	463,642
Outstanding at end of year, weighted-average exercise price	$ 4.62	$ 4.68	$ 5.84
Options exercisable at period end, shares	395,233	317,467
Options exercisable at period end, weighted-average exercise price	$ 5.70	$ 6.58
Weighted-average fair value of options granted during the period		$ 1.49