Segment Information (Details) (USD $) In Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Segment Reporting Information [Line Items]
Number of customers	more than 6,000 customers		more than 6,000 customers
Revenues	$ 171,563	$ 158,443	$ 497,579	$ 448,447
Operating Income (Loss)	(32,832)	(17,535)	(106,244)	(34,338)
Depreciation	3,227	2,853	9,997	8,281
General and Administrative Expense	16,018	17,546	54,420	55,044
Amortization of Intangible Assets	9,562	9,966	28,872	28,447
Restructuring charges	768	4,172	1,749	16,478	21,000
Acquisition-related costs	0	473	0	8,081
Litigation settlement	0	0	(37,500)	0
Supply Chain [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information, Revenue for Reportable Segment	165,298	153,706	481,540	431,870
Operating Income (Loss)	(57,923)	(50,435)	(153,043)	(142,977)
Depreciation	3,132	2,708	9,692	7,769
Pricing and Revenue Management [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information, Revenue for Reportable Segment	6,265	4,737	16,039	16,577
Operating Income (Loss)	(1,257)	743	(742)	589
Depreciation	95	145	305	512
Unallocated Amount to Segment [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	$ 26,348	$ 32,157	$ 47,541	$ 108,050

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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-Name Accounting Standards Codification

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- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 59

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Section 25

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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-Publisher FASB

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-Publisher AICPA

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- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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-Paragraph 2

-Subparagraph (SX 210.5-03.4)

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- Definition

This element represents the gross amount awarded, to be received by, or to be remitted to the entity in settlement of litigation occurring during the period.

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

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- Definition

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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-Name Staff Accounting Bulletin (SAB)

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- Definition

Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains.

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-Publisher SEC

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-Number 210

-Article 5

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of total revenue for the reportable segments, including revenue from external customers, transactions with other operating segments of the same entity, and (gross) interest revenue. All considered to be "operating revenue" for purposes of the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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