CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Jun. 30, 2012	Dec. 31, 2011
SHAREHOLDERS' EQUITY:
Preferred shares, par value (in dollars per share)	$ 0	$ 0
Preferred shares, shares authorized (in shares)	1,000,000	1,000,000
Preferred shares, shares outstanding (in shares)	0	0
Common shares, par value (in dollars per share)	$ 0	$ 0
Common shares, shares authorized (in shares)	12,000,000	12,000,000
Common shares, shares issued (in shares)	7,474,269	7,460,494
Treasury shares at cost (in shares)	753,627	755,771