Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012 Customers	Mar. 31, 2011 As Restated [Member]		Mar. 31, 2012 Supply Chain [Member]	Mar. 31, 2011 Supply Chain [Member] As Restated [Member]	Mar. 31, 2012 Pricing and Revenue Management [Member]	Mar. 31, 2011 Pricing and Revenue Management [Member] As Restated [Member]	Mar. 31, 2012 Unallocated Amount to Segment [Member]	Mar. 31, 2011 Unallocated Amount to Segment [Member] As Restated [Member]
Segment Reporting Information [Line Items]
Number of customers worldwide (customers)	6,000
Revenues	$ 162,186	$ 167,518		$ 156,839	$ 163,205	$ 5,347	$ 4,313
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	7,494	53,299		50,252	53,783	(65)	(387)	(42,693)	(97)
Depreciation	3,668	3,364		3,585	3,259	83	105
General and administrative	24,819	22,359	[1]
Amortization of intangibles	9,530	9,718	[1]
Restructuring charges	2,219	542	[1]
Litigation settlement	0	(37,500)	[1]
Interest expense and amortization of loan fees	6,417	6,211	[1]
Nonoperating Income (Expense)	$ 292	$ 1,233	[1]

[1] (1) As restated - See Note 14 “Restatement of Previously Issued Financial Statements” of Notes to Condensed Consolidated Financial Statements.See notes to Condensed Consolidated Financial Statements.