Consolidated Balance Sheets Parentheticals (USD $)	Dec. 31, 2011	Dec. 31, 2010
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	38,000,000	38,000,000
Common shares, shares issued	22,101,723	22,101,723
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, shares authorized	2,000,000	2,000,000
Preferred shares, shares issued	4,000	4,000
Treasury stock, shares	3,365,366	3,577,388