Income Taxes (Tables)

6 Months Ended

Jun. 30, 2012

Schedule Of Deferred Tax Assets And Liabilities

The components of our net deferred tax asset are as follows.

	June 30, 2012			December 31, 2011
	(Dollars in thousands)
Deferred tax assets:
Federal net operating loss carryforwards	$	137,736		$	133,454
State net operating loss carryforwards		53,815			53,350
Stock-based compensation expense		27,775			26,771
Accrued liabilities		26,299			29,600
Asset impairment charges		24,665			31,137
Alternative minimum tax and other tax credit carryforwards		10,296			10,296
Inventory, additional costs capitalized for tax		3,466			3,466
Unrealized loss on marketable securities		535			2,787
Other		1,593			1,522
Total deferred tax assets		286,180			292,383
Valuation allowance		(273,828	)		(281,178	)
Total deferred tax assets, net of valuation allowance		12,352			11,205
Deferred tax liabilities:
Deferred revenue		6,420			5,589
Property, equipment and other assets		1,013			706
Inventory, additional costs capitalized for financial statement purposes		537			542
Accrued liabilities		32			32
Other, net		4,350			4,336
Total deferred tax liabilities		12,352			11,205
Net deferred tax asset	$	—		$	—