Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
(Loss) gain before income taxes
Domestic	$ (130,843,000)	$ (4,653,000)	$ (12,512,000)
Foreign	249,000	1,400,000	1,661,000
Loss before income taxes	(130,594,000)	(3,253,000)	(10,851,000)
Provision for income taxes varied from the federal statutory rate applied to total income
Federal income tax at statutory rate (as a percent)	35.00%	35.00%	35.00%
State income taxes, net of federal benefit	214,000	263,000	463,000
Other non-deductible items	258,000	334,000	384,000
Goodwill writeoff	29,057,000
Net change to valuation allowance, excluding change due to acquisitions	19,872,000	(2,080,000)	3,785,000
Total income tax provision (benefit)	3,693,000	(2,622,000)	834,000
Federal income tax (benefit) computed at statutory rate (35%)	(45,708,000)	(1,139,000)	(3,798,000)
Current:
State	330,000	405,000	713,000
Foreign	107,000	229,000	121,000
Total current provision for taxes	437,000	634,000	834,000
Deferred:
Foreign	3,256,000	(3,256,000)
Total deferred provision for taxes	3,256,000	(3,256,000)
Total income tax provision (benefit)	3,693,000	(2,622,000)	834,000
Deferred tax assets:
Tax net operating loss and tax credit carryforwards	242,416,000	227,870,000	227,804,000
Reserves and accruals	1,893,000	3,290,000	3,195,000
Net deferred revenue	6,677,000	7,812,000	7,356,000
Other tax assets	8,634,000	8,208,000	9,811,000
Valuation allowance	(252,240,000)	(232,368,000)	(237,848,000)
Total deferred tax assets	7,380,000	14,812,000	10,318,000
Deferred tax liabilities:
Tax over book depreciation/amortization	(7,380,000)	(11,556,000)	(10,318,000)
Total deferred tax liabilities	(7,380,000)	(11,556,000)	(10,318,000)
Net deferred tax asset		$ 3,256,000