Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Federal
Current	$ (3,649)	$ (1,494)	$ 3,209
Deferred	21,208	3,029	(10,985)
State and local
Current	(893)	(457)	3,276
Deferred	7,936	1,129	(5,278)
Total income tax expense/(benefit) from continuing operations	24,602	2,207	(9,778)
Reconciliation of U.S. federal statutory income tax rate to the effective income tax rate
Federal statutory tax rate (as a percent)	35.00%
Federal statutory rate - 35%	(18,673)	(21,657)	(9,024)
(Decrease)/increase of deferred tax asset valuation allowance	33,261
Goodwill impairment	7,383	24,172
Compensation	3,734	44	(565)
Change in estimated state tax rates	(656)	530	281
Meals and entertainment	230	222	250
Provision to return adjustments	(102)	(1,474)	645
State and local income taxes, net of federal income taxes	(97)	715	(1,797)
Uncertain tax positions	(36)	334	(1,205)
Gain on bargain purchase - ClearPoint acquisition		(816)
Series B Preferred Stock dividends			1,012
Loss on extinguishment of Series B Preferred Stock			563
Other	(442)	137	62
Total income tax expense/(benefit) from continuing operations	24,602	2,207	(9,778)
Deferred tax assets, net
Net operating loss carryforwards	18,747	9,733
Stock-based compensation	12,061	17,259
Accrued liabilities	2,230	3,520
Investments	(863)	(2,252)
Uncertain tax positions	831	831
Fixed assets	(337)	732
Intangible assets	(823)	(645)
Deferred revenues	92	(33)
Other	1,323	1,621
Total net deferred tax asset before valuation allowance	33,261	30,766
Less: valuation allowance	(33,261)
Total deferred tax assets, net of valuation allowance		30,766
Deferred tax liabilities
State effect of intangible assets		(363)
State effect of investments		(890)
Other		(369)
Total deferred tax liabilities		$ (1,622)