Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Shareholders' equity:
Common shares, par value	$ 0	$ 0	$ 0
Common shares, shares authorized	42,000	42,000	25,000
Common shares, shares issued	19,198	19,198	19,198
Preferred shares, par value	$ 0	$ 0	$ 0
Preferred shares, shares authorized	1,000	1,000	1,000
Preferred shares, shares issued	0	0	0
Treasury shares, at cost	629	762	769