Note 20 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

	Number of Restricted Stock Units		Weighted-Average Grant Date Fair Values
Outstanding on December 31, 2015		774,545	$19.13
Granted		331,195	13.85
Vested		395,577	18.89
Forfeited		58,619	19.40
Outstanding on December 31, 2016		651,544	16.57

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

	Shares Under Option		WeightedAverage Exercise Price Per Share	WeightedAverage Remaining Contractual Life (Years)	Aggregate Intrinsic Value ($ millions)
Outstanding on December 31, 2015		1,520,795	$18.89
Granted		824,540	13.84
Exercised		5,797	13.76
Forfeited		125,079	17.47
Outstanding on December 31, 2016		2,214,459	17.10	5.67	$2
Exercisable on December 31, 2016		717,095	20.28	5.01	-
Expected to vest December 31, 2016		1,497,364	15.58	5.99	2

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

	Year Ended December 31,
	2016	2015	2014
Weighted-average fair value of options granted	$5.56	$5.94	$7.74
Weighted-average risk-free interest rate	1.32%	1.46%	1.46%
Range of risk-free interest rates	0.93% - 1.96%	1.26% - 1.60%	1.39% - 1.51%
Weighted-average expected option lives	4.6 years	4.5 years	4.5 years
Expected option lives	4.5 - 4.9 years	4.5 years	4.5 years
Weighted-average volatility	47%	46%	39%
Range of expected volatilities	44% - 51%	40% - 49%	36% - 42%
Weighted-average expected dividend yield	0.0%	0.0%	0.0%