Note 12 - Stock Incentive and Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity [Table Text Block]

	2014					2013					2012
	Number of Shares			Weighted Average Exercise Price		Number of Shares			Weighted Average Exercise Price		Number of Shares			Weighted Average Exercise Price
Outstanding, beginning of year		19,781,866		$	5.54		18,616,382		$	4.21		17,877,785		$	4.33
Granted		6,515,269			7.90		6,261,602			8.40		6,222,222			4.24
Exercised		(2,620,925	)		3.64		(4,479,325	)		3.55		(4,677,271	)		2.79
Canceled		(1,584,669	)		14.24		(616,793	)		8.79		(806,354	)		16.04
Outstanding, end of year		22,091,541		$	5.84		19,781,866		$	5.54		18,616,382		$	4.21
Exercisable at end of year		9,762,383		$	3.98		9,736,564		$	4.28		11,956,258		$	4.17
Available for future grant		51,230,067					13,971,091					23,283,953

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

Outstanding										Exercisable
Exercise Prices				Number		Weighted Average Exercise		Weighted Average Remaining Contractual		Number		Weighted Average Exercise
Low		High		of Shares		Price		Life		of Shares		Price
$	0.67	$	4.29		10,384,020	$	3.28		1.91		7,900,969	$	3.28
$	5.67	$	7.93		3,522,760	$	7.39		4.66		70,693	$	7.39
$	8.17	$	9.29		8,184,761	$	8.42		3.59		1,790,721	$	8.42

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

	2014			2013			2012
Dividend yield		0.00	%		0.00	%		0.00	%
Expected volatility		48.44	%		57.70	%		82.09	%
Risk-free interest rate		0.95	%		0.36	%		0.73	%
Expected life (years)		3.5			3.5			2.5

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

	2014					2013					2012
	Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value
Outstanding, beginning of year		538,530		$	6.72		344,448		$	4.31		—		$	—
Granted		472,951			7.84		317,643			8.39		359,599			4.31
Vested		(211,550	)		6.32		(114,820	)		4.31		—			—
Canceled		(29,216	)		6.73		(8,741	)		4.29		(15,151	)		4.29
Outstanding, end of year		770,715		$	7.51		538,530		$	6.72		344,448		$	4.31

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

	2014				2013					2012
	Number of Shares		Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares		Weighted Average Grant Date Fair Value
Outstanding, beginning of year		602,242	$	5.81		405,012		$	4.29		—	$	—
Granted		227,914		11.01		223,454			8.39		405,012		4.29
Vested		—		—		—			—		—		—
Canceled		—		—		(26,224	)		4.29		—		—
Outstanding, end of year		830,156	$	7.24		602,242		$	5.81		405,012	$	4.29

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

	Year Ended December 31,
	2014		2013		2012
	(Dollars in thousands)
Stock options and stock appreciation rights	$	3,618	$	3,875	$	4,523
Unrestricted stock grants		480		400		488
Restricted stock grants		1,842		1,073		378
Performance share awards		2,529		3,667		1,762
Total	$	8,469	$	9,015	$	7,151

Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block]

	2014				2013				2012
	Unrecognized Expense		Weighted Average Period (years)		Unrecognized Expense		Weighted Average Period (years)		Unrecognized Expense		Weighted Average Period (years)
	(Dollars in thousands)
Unvested stock options and stock appreciation rights	$	6,777		2.1	$	5,260		1.9	$	4,395		1.7
Unvested restricted stock grants		4,090		2.1		2,473		2.0		1,098		2.2
Unvested performance share awards		3,267		1.7		7,320		1.8		5,188		2.2
Total unrecognized compensation expense	$	14,134		2.0	$	15,053		1.9	$	10,681		2.0