Consolidated Balance Sheets (Parentheticals) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Preferred stock (dollars per share)	$ 0.10	$ 0.10
Preferred shares authorized	10,000,000	10,000,000
Common stock	$ 0.10	$ 0.10
Common shares authorized	100,000,000	100,000,000
Common shares issued	18,799,641	18,793,649
Common stock outstanding	15,582,986	16,183,442
Common stock in treasury	3,216,655	2,610,207