Note 11 - Stock Based Compensation and Other Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2015

Restricted Stock Units (RSUs) [Member]

Notes Tables

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]

	Year Ended December 31,
	2015		2014		2013
Estimated fair value at date of grant	$	10.06	$	12.55	$	13.11

Employee Stock Option [Member]

Notes Tables

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]

	Year Ended December 31,
	2015		2014		2013
Weighted-average exercise price of the stock on the date of grant	$	9.00	$	11.20	$	11.43
Weighted-average grant date fair value on the date of grant	$	3.91	$	4.97	$	5.42

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

	Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
Outstanding at beginning of period		3,342,015		$	7.67
Granted		695,698			9.00
Exercised		(104,339	)		5.30
Expired or cancelled		(45,541	)		8.94
Outstanding at end of period		3,887,833		$	7.96		6.20	$	877,383
Vested or expected to vest at end of period		3,831,985		$	7.93		6.16	$	877,383
Options exercisable at end of period		2,715,043		$	7.10		5.06	$	877,383

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

	Year Ended December 31,
	2015			2014			2013
Risk-free interest rate		1.57	%		1.53	%		1.02	%
Expected life of the option in years		5.22			5.22			5.22
Expected volatility		47.3	%		48.6	%		53.7	%
Dividend yield		-			-			-

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

	Rights
Outstanding at beginning of period		107,133
Exercised		-
Expired or cancelled		(4,000	)
Outstanding at end of period		103,133
Exercisable at end of period		103,133

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

Nonvested Shares (Performance-Based)	Shares		Weighted-Average Grant Date Fair Value
Outstanding at beginning of period		198,448	$	12.82
Granted		136,881		10.06
Forfeited		-
Outstanding at the end of period		335,329	$	11.69

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

	Year Ended December 31,
	2015				2014				2013
Risk-free interest rate		1.02	%			0.81	%			0.52	%
Average closing price	$	8.96		(1)	$	11.28		(2)	$	11.33	(3)
Expected volatility		38.4	%			44.5	%			53.6	%
Dividend yield		-				-				-

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

Nonvested Shares (Time-Vesting)	Shares			Weighted-Average Grant Date Fair Value
Nonvested at January 1, 2015		1,722,899		$	10.58
Granted		142,218			9.10
Vested		(932,161	)		9.95
Forfeited		(51,611	)		10.60
Nonvested at December 31, 2015		881,345		$	11.00

Nonvested Share Units (Time-Vesting)	Shares			Weighted-Average Grant Date Fair Value
Nonvested at January 1, 2015		158,878		$	10.22
Granted		1,074,937			8.95
Vested		(80,257	)		9.20
Forfeited		(20,015	)		9.12
Nonvested at December 31, 2015		1,133,543		$	9.11