Segment Information (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010		Dec. 31, 2009
Segment Reporting Information [Line Items]
Revenues	$ 691,243
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	102,619
Depreciation	13,322	12,783		9,700
General and administrative	72,493
Amortization of intangible assets	38,421
Restructuring charge and adjustments to acquisition-related reserves	1,922	20,931		6,865
Acquisition-related costs	0
Litigation provision	(1,500)
Interest and Debt Expense	25,500
Finance costs on abandoned acquisition	0
Interest and Other Income	3,791
Supply Chain [Member]
Segment Reporting Information [Line Items]
Revenues	666,286
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	234,299
Depreciation	12,937
Pricing and Revenue Management [Member]
Segment Reporting Information [Line Items]
Revenues	24,957
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	4,365
Depreciation	385
Unallocated Amount to Segment [Member]
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(136,045)
General and administrative	72,493
Amortization of intangible assets	38,421
Restructuring charge and adjustments to acquisition-related reserves	1,922
Acquisition-related costs	0
Litigation provision	1,500
Interest and Debt Expense	25,500
Finance costs on abandoned acquisition	0
Interest and Other Income	(3,791)
As Restated [Member]
Segment Reporting Information [Line Items]
Revenues		593,742		390,968
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest		(1,921)	[1]	44,761	[1]
Depreciation		12,783		9,686
General and administrative		72,112	[1]	47,580	[1]
Amortization of intangible assets		38,415	[1]	23,633	[1]
Restructuring charge and adjustments to acquisition-related reserves		20,931	[1]	6,865	[1]
Acquisition-related costs		8,115	[1]	4,768	[1]
Litigation provision		(14,000)	[1]	0	[1]
Interest and Debt Expense		24,758	[1]	2,712	[1]
Finance costs on abandoned acquisition		0	[1]	(767)	[1]
Interest and Other Income		1,478	[1]	1,213	[1]
As Restated [Member] | Supply Chain [Member]
Segment Reporting Information [Line Items]
Revenues		573,631		360,670
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest		176,559		120,803
Depreciation		12,135		8,637
As Restated [Member] | Pricing and Revenue Management [Member]
Segment Reporting Information [Line Items]
Revenues		20,111		30,298
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest		(1,627)		7,536
Depreciation		648		1,049
As Restated [Member] | Unallocated Amount to Segment [Member]
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest		(176,853)		(83,578)
General and administrative		72,112		47,580
Amortization of intangible assets		38,415		23,633
Restructuring charge and adjustments to acquisition-related reserves		20,931		6,865
Acquisition-related costs		8,115		4,768
Litigation provision		14,000		0
Interest and Debt Expense		24,758		2,712
Finance costs on abandoned acquisition		0		(767)
Interest and Other Income		$ (1,478)		$ (1,213)

[1] As restated - See Note 23 “Restatement of Previously Issued Financial Statements” of Notes to Consolidated Financial Statements.