Note 18 - Equity Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

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

						Weighted-Average		Aggregate
				Weighted-Average		Remaining Contractual		Intrinsic
	Shares			Exercise Price		Life (in years)		Value (in thousands)
Balance, December 31, 2014		2,332,904			32.34		1.2	$	1,388
Exercised		(214,580	)	$	23.37
Forfeited		(1,087,154	)		35.13
Balance, December 31, 2015		1,031,170			31.27		0.9	$	3,268
Exercised		(327,830	)	$	23.37
Forfeited		(620,670	)		36.50
Balance, December 31, 2016		82,670			23.37		1.1	$	1,211
Exercised		(46,790	)	$	23.37
Balance, December 31, 2017		35,880			23.37		0.1	$	675
Exercisable, December 31, 2017		35,880		$	23.37		0.1	$	675

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

	Units
Balance at December 31, 2014		386,465
Granted		191,518
Vested		(26,924	)
Cancelled or forfeited		(8,684	)
Balance at December 31, 2015		542,375
Granted		206,372
Vested		(13,780	)
Cancelled or forfeited		(7,548	)
Balance at December 31, 2016		727,419
Granted		247,045
Vested		(395,502	)
Cancelled or forfeited		(17,352	)
Balance at December 31, 2017		561,610