Note 9 - Equity Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Nonvested Restricted Stock Shares Activity [Table Text Block]

	Shares			Weighted Average Grant Date Fair Value
Nonvested at December 31, 2015		546,524		$	27.05
Granted		1,000,485			3.54
Vested		(255,851	)		21.80
Forfeited		(52,436	)		8.90
Nonvested at December 31, 2016		1,238,722			9.91

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

	2016		2015		2014
Weighted average grant date fair value of restricted stock awards granted	$	3.54	$	13.09	$	44.49
Fair value of restricted stock vested (in millions)	$	5.6	$	8.1	$	5.9

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

	2015			2014
Expected option life - years		4.5			4.5
Volatility		41.05	%		40.36	%
Risk-free interest rate		1.30	%		1.55	%
Dividend yield		0	%		2.10	%

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

	2016					2015					2014
				Weighted					Weighted					Weighted
				Average					Average					Average
				Exercise					Exercise					Exercise
	Shares			Price		Shares			Price		Shares			Price
Outstanding at beginning of year		222,019		$	27.01		140,293		$	41.68		112,054		$	41.02
Granted		-			-		165,879			12.45		36,394			44.19
Forfeitures		(10,000	)		12.55		(84,153	)		26.89		(8,155	)		42.55
Exercised		-			-		-			-		-			-
Outstanding at end of year		212,019		$	27.69		222,019		$	27.01		140,293		$	41.68
Exercisable shares and weighted average exercise price		128,532		$	33.83		57,859		$	42.05		37,351		$	41.02
Shares available for future grants at December 31:
2011 Director Plan		54,537					78,582					93,772
2010 Plan		-					-					378,374
2014 Plan		360,438					982,548					-

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

			Outstanding						Exercisable
					Weighted		Weighted				Weighted
					Average		Average				Average
Range of Exercise Prices			Shares		Exercise Price		Remaining Life		Shares		Exercise Price
$9.19	-	46.57		212,019	$	27.69		-		140,293	$	41.68
				212,019	$	27.69				140,293	$	41.68