Note 20 - Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Year Ended December 31,
	2016					2015					2014
				Weighted-					Weighted-					Weighted-
				Average					Average					Average
	Number of			Exercise		Number of			Exercise		Number of			Exercise
	Shares			Price		Shares			Price		Shares			Price
Outstanding Stock Option Activity
Outstanding, beginning of year		6,706,123		$	30.46		5,054,623		$	35.91		5,469,948		$	38.03
Granted (1)		42,000			21.68		2,359,500			27.05		268,625			26.96
Exercised		-			-		(31,250	)		21.21		(18,000	)		20.82
Forfeited		(10,000	)		29.80		(121,250	)		28.61		(23,750	)		25.16
Cancelled		(586,000	)		53.26		(555,500	)		66.51		(642,200	)		62.43
Outstanding, end of year		6,152,123		$	28.23		6,706,123		$	30.46		5,054,623		$	35.91

Schedule of Nonvested Share Activity [Table Text Block]

	Year Ended December 31,
	2016					2015					2014
				Weighted-					Weighted-					Weighted-
	Number of			Average		Number of			Average		Number of			Average
	Shares			Fair Value		Shares			Fair Value		Shares			Fair Value
Unvested Stock Option Activity
Outstanding, beginning of year		2,344,061		$	5.63		483,312		$	9.20		872,468		$	8.09
Granted (1)		42,000			4.04		2,359,500			5.26		268,625			7.17
Vested		(85,095	)		8.13		(377,501	)		6.76		(634,031	)		8.30
Forfeited		(10,000	)		6.61		(121,250	)		9.33		(23,750	)		7.60
Unvested, end of year		2,290,966		$	5.50		2,344,061		$	5.63		483,312		$	9.20

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]

Exercisable or expected to vest
Number outstanding		6,098,279
Weighted-average exercise price	$	28.25
Aggregate intrinsic value (in thousands)	$	3,149
Weighted-average remaining contractual term (years)		5.59
Exercisable
Number outstanding		3,861,157
Weighted-average exercise price	$	28.96
Aggregate intrinsic value (in thousands)	$	2,970
Weighted-average remaining contractual term (years)		4.01

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

			Options Outstanding						Options Exercisable
					Weighted-						Weighted-
					Average						Average
					Remaining		Weighted-				Remaining		Weighted-
					Contractual		Average				Contractual		Average
			Number		Life (in		Exercise		Number		Life (in		Exercise
Range of Exercise Price			Outstanding		years)		Price		Outstanding		years)		Price
$ 15.01	-	$ 20.00		42,000		5.07	$	19.95		42,000		5.07	$	19.95
$ 20.01	-	$ 25.00		1,215,375		5.44		23.21		1,119,346		5.21		23.25
$ 25.01	-	$ 30.00		3,424,748		7.08		27.47		1,249,937		4.88		28.16
$ 30.01	-	$ 35.00		863,625		3.14		31.82		862,312		3.14		31.82
$ 35.01	-	$ 40.00		606,375		1.23		38.02		587,562		1.08		38.04
Total				6,152,123		5.61	$	28.23		3,861,157		4.01	$	28.96

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Year Ended December 31,
	2016					2015					2014
				Weighted-					Weighted-					Weighted-
				Average					Average					Average
	Number of			Grant Date		Number of			Grant Date		Number of			Grant Date
	Shares			Fair Value		Shares			Fair Value		Shares			Fair Value
Unvested, beginning of year		99,442		$	29.75		184,201		$	32.26		298,991		$	32.87
Granted		154,703		$	22.06		36,896			26.44		39,381			30.85
Vested		(64,535	)	$	30.71		(111,719	)		32.86		(141,454	)		33.08
Forfeited		-			N/A		(9,936	)		29.11		(12,717	)		33.05
Unvested, end of year		189,610		$	23.15		99,442		$	29.75		184,201		$	32.26

Market-Based Awards [Member]

Notes Tables

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Expected volatility	27.8	%
Risk free interest rate	2.2	%
Dividend yield rate	3.5	%

Employee Stock Option [Member]

Notes Tables

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Year Ended December 31,
	2016			2015			2014
Expected lives of options (in years)		5.0			3.9			4.0
Expected volatility		32.1	%		29.6	%		43.2	%
Risk free interest rate		1.6	%		1.2	%		1.3	%
Dividend yield rate		4.4	%		3.5	%		3.5	%