Note 14 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year Ended December 31,
	2014		2013			2012
	(Dollars in thousands)
Current tax provision (benefit)
Federal	$	1,631	$	2,611		$	(374	)
State		1,475		-			(1,210	)
Total current		3,106		2,611			(1,584	)
Deferred tax provision (benefit)
Federal		28,630		(171,037	)		-
State		5,596		(16,134	)		-
Total deferred		34,226		(187,171	)		-
Provision for (benefit from) income taxes	$	37,332	$	(184,560	)	$	(1,584	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended December 31,
	2014			2013			2012
	(Dollars in thousands)
Tax expense computed at federal statutory rate	$	35,166		$	45,439		$	21,390
State income tax expense, net of federal benefit		3,340			4,544			2,139
Permanent differences		(1,435	)		(358	)		1,771
Expiration of state net operating loss		3,030			3,874			2,634
Tax expense (benefit) related to an increase (decrease) in unrecognized tax benefits		559			(552	)		(1,857	)
Write-off of deferred tax asset for deferred compensation retirement plans		-			11,856			-
Charitable contributions statute expiration		181			-			-
Federal energy credits		(1,131	)		(6,530	)		-
Rate changes		866			-			-
Change in valuation allowance		(1,665	)		(242,833	)		(27,661	)
Other		(1,579	)		-			-
Provision for (benefit from) income taxes	$	37,332		$	(184,560	)	$	(1,584	)
Effective tax (benefit) rate		37.2%			(142.2%	)		(2.6%	)

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	December 31,
	2014			2013
	(Dollars in thousands)
Deferred tax assets:
Federal net operating loss carryforwards	$	47,200		$	72,700
State net operating loss carryforwards		36,100			38,082
Alternative minimum tax and other tax credit carryforwards		27,582			24,196
Stock-based compensation expense		22,545			26,651
Warranty, litigation and other reserves		12,364			15,543
Receivables from related party		10,273			12,132
Accrued compensation		6,442			11,136
Asset impairment charges		2,785			5,496
Inventory, additional costs capitalized for tax purposes		3,257			1,700
Other, net		1,806			3,446
Total deferred tax assets		170,354			211,082
Valuation allowance		(13,027	)		(14,669	)
Total deferred tax assets, net of valuation allowance		157,327			196,413
Deferred tax liabilities:
Property, equipment and other assets		5,025			5,512
Discount on notes receivable		4,149			4,204
Deferred revenue		4,306			3,985
Unrealized gain on marketable securities		1,737			4,915
Other, net		1,624			1,535
Total deferred tax liabilities		16,841			20,151
Net deferred tax asset	$	140,486		$	176,262

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

	Year Ended December 31,
	2014			2013			2012
	(Dollars in thousands)
Gross unrecognized tax benefits at beginning of year	$	371		$	575		$	2,712
Increases related to prior year tax positions		633			124			63
Decreases related to prior year tax positions		(85	)		(53	)		(84	)
Increases related to current year tax positions		-			-			-
Decreases related to current year tax positions		-			-			-
Settlements with taxing authorities		-			-			-
Lapse of applicable statute of limitations		(14	)		(275	)		(2,116	)
Gross unrecognized tax benefits at end of year	$	905		$	371		$	575