Note 19 - Equity Incentive Plans (Details) - Stock Options Outstanding and Exercisable (USD $)	0 Months Ended				12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 30, 2011
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares outstanding	2,332,904	2,812,874	3,996,630		2,332,904	2,812,874	3,996,630	4,356,985
Weighted-average remaining contractual life	1 year 73 days	1 year 328 days	2 years 73 days	3 years	1 year 73 days
Shares exercisable	2,332,904				2,332,904
Thirty Seven Dollars [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price (in Dollars per share)	37.00				37.00
Shares outstanding	563,610				563,610
Weighted-average remaining contractual life					36 days
Shares exercisable	563,610				563,610
Thirty Two Dollars Forty Seven Cents [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price (in Dollars per share)	32.47				32.47
Shares outstanding	245,060				245,060
Weighted-average remaining contractual life					73 days
Shares exercisable	245,060				245,060
Thirty Three Dollars Fifty Four Cents [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price (in Dollars per share)	33.54				33.54
Shares outstanding	264,694				264,694
Weighted-average remaining contractual life					146 days
Shares exercisable	264,694				264,694
Thirty Six Dollars Ninety Cents [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price (in Dollars per share)	36.90				36.90
Shares outstanding	211,730				211,730
Weighted-average remaining contractual life					1 year 36 days
Shares exercisable	211,730				211,730
Thirty Eight Dollars Twenty Six Cents [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price (in Dollars per share)	38.26				38.26
Shares outstanding	12,000				12,000
Weighted-average remaining contractual life					1 year 109 days
Shares exercisable	12,000				12,000
Thirty Six Dollars Twenty Four Cents [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price (in Dollars per share)	36.24				36.24
Shares outstanding	410,730				410,730
Weighted-average remaining contractual life					1 year 36 days
Shares exercisable	410,730				410,730
Twenty Three Dollars Thirty Seven Cents [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price (in Dollars per share)	23.37				23.37
Shares outstanding	625,080				625,080
Weighted-average remaining contractual life					3 years 73 days
Shares exercisable	625,080				625,080