Segment Information and Concentrations of Risk (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Segment Reporting Information [Line Items]
Percent of revenue earned by an operating group (in hundredths)													87.00%
Number of operating business units													2
Number of primary end users, providers and consumers													2
Number of reportable segments													2
Net sales:
Software and other													$ 94,466		$ 80,948		$ 42,420
Professional services													40,978		41,905		23,175
Maintenance and EDI													113,460		109,575		74,737
Total net sales	64,646	60,394	62,886	60,978	64,087	60,077	55,592	52,672	46,170	45,189	29,003	19,970	248,904		232,428		140,332
Expenses													225,723		187,304		128,987
Segment income (loss)													23,181		45,124		11,345
Net corporate/other expenses													47,910	[1]	46,990	[1]	36,507	[1]
Loss before income taxes	(16,571)	(2,142)	(3,758)	(2,258)	(208)	(1,255)	341	(744)	(3,696)	(3,459)	(14,903)	(3,104)	(24,729)		(1,866)		(25,162)
Depreciation and amortization													20,295		22,208		17,812
Restructuring and other one time charges													830		1,216		5,006
Assets	436,853				450,387				396,645				436,853		450,387		396,645
By Geographic Information [Abstract]
Long lived assets	4,964				4,391				5,772				4,964		4,391		5,772
Foreign Sales [Member]
Net sales:
Foreign sales specified as a percentage of net sales (in hundredths)													6.00%		9.00%		10.00%
Sales In Foreign Currency [Member]
Net sales:
Foreign sales specified as a percentage of net sales (in hundredths)													3.00%		2.00%		1.00%
United States of America [Member]
Net sales:
Total net sales													232,848		211,907		125,974
By Geographic Information [Abstract]
Long lived assets	4,316				3,866				5,105				4,316		3,866		5,105
Europe [Member]
Net sales:
Total net sales													8,687		8,767		7,730
By Geographic Information [Abstract]
Long lived assets	79				3				56				79		3		56
Japan [Member]
Net sales:
Total net sales													2,190		5,312		2,853
Korea [Member]
Net sales:
Total net sales													1,018		1,449		718
Canada [Member]
Net sales:
Total net sales													1,707		1,598		491
By Geographic Information [Abstract]
Long lived assets	569				520				606				569		520		606
Other [Member]
Net sales:
Total net sales													2,454		3,395		2,566
By Geographic Information [Abstract]
Long lived assets	0				2				5				0		2		5
Healthcare [Member]
Net sales:
Software and other													78,941		76,947		42,379
Professional services													27,552		23,437		13,183
Maintenance and EDI													110,894		109,562		74,737
Total net sales													217,387		209,946		130,299
Expenses													192,408		166,898		118,179
Segment income (loss)													24,979		43,048		12,120
Depreciation and amortization													16,049		19,311		15,702
Restructuring and other one time charges													333		1,216		4,578
Assets	412,841				354,442				326,037				412,841		354,442		326,037
DNA [Member]
Net sales:
Software and other													15,525		4,001		41
Professional services													13,426		18,468		9,992
Maintenance and EDI													2,566		13		0
Total net sales													31,517		22,482		10,033
Expenses													33,315		20,406		10,808
Segment income (loss)													(1,798)		2,076		(775)
Depreciation and amortization													4,187		2,165		1,820
Restructuring and other one time charges													497		0		10
Assets	33,207				47,722				29,764				33,207		47,722		29,764
Corporate/Other [Member]
Net sales:
Depreciation and amortization													59		732		290
Restructuring and other one time charges													0		0		418
Assets	$ (9,195)				$ 48,223				$ 40,844				$ (9,195)		$ 48,223		$ 40,844

[1] Net corporate/other expenses include public company costs, corporate administration expenses, amortization expense which is not attributable to business segments, acquisition-related expenses and net interest expense.