Condensed Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Per Share data	Jun. 30, 2011	Dec. 31, 2010
Preferred shares, par value (in Dollars per share)	$ 0.01	$ 0.01
Preferred shares, shares authorized	10,000	10,000
Preferred shares, issued	0	0
Preferred shares, outstanding	0	0
Common shares, par value (in Dollars per share)	$ 0.01	$ 0.01
Common shares, shares authorized	100,000	100,000
Common shares, shares issued	23,713	23,615
Treasury shares, at cost, shares	8,211	8,076