Note 15 - Subsequent Event (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended	1 Months Ended
	Dec. 31, 2012	Feb. 27, 2013 Subsequent Event [Member]
Stock Repurchase Program, Authorized Amount (in Dollars)	$ 100.0	$ 100.0
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased		7.2