Stock Compensation Plans (Details) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Options, Outstanding (in shares)	317,800
Options,Forfeited or cancelled (in shares)	0
Options, Exercised (in shares)	500
Options, Granted (in shares)	0
Options, Outstanding (in shares)	317,300
Options Outstanding,Vested or expected to vest (in shares)	317,300
Options, Exercisable (in shares)	276,460
Weighted Average Exercise Price, Options outstanding (in dollars per share)	$ 20.35
Weighted Average Exercise Price, Forfeited or cancelled (in dollars per share)	$ 0
Weighted Average Exercise Price, Exercised (in dollars per share)	$ 9.22
Weighted Average Exercise Price, Granted (in dollars per share)	$ 0
Weighted Average Exercise Price, Options outstanding (in dollars per share)	$ 20.37
Weighted Average Exercise Price, Vested or expected to vest (in dollars per share)	$ 20.37
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 21.53
Options outstanding, Weighted Average Remaining Contractual Term	4 years 1 month 24 days
Vested or expected , Weighted Average Remaining Contractual Term	4 years 1 month 24 days
Exercisable, Weighted Average Remaining Contractual Term	3 years 9 months 29 days
Aggregate Intrinsic Value, Options outstanding (in dollars)	$ 507
Weighted Average Exercise Price Aggregate Intrinsic Value, Vested or expected to vest (in dollars)	507
Weighted Average Exercise Price Aggregate Intrinsic Value, Exercisable (in dollars)	$ 306