Note 13 - Treasury Shares (Detail) - Common Shares Held by the Company	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Held at beginning of year	4,300,278	4,297,782
Surrender of shares issued under incentive compensation plan	7,694	2,496
Held at end of year	4,307,972	4,300,278