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Acquisitions - Intangible Assets Acquired (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 Years | Dec. 31, 2010 Years
RFPD and NuHorizons Combined [Member] |  |  |  |
Intangible Assets Acquired As Part Of Business Combination [Line Items] |  |  |  |
Business Acquisition, Purchase Price Allocation, Current Assets, Receivables | $ 194,312 |  |  |
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets | 90,900 |  |  |
Business Acquisition, Purchase Price Allocation, Current Assets, Inventory | 169,881 |  |  |
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment | 11,278 |  |  |
Business Acquisition, Purchase Price Allocation, Other Noncurrent Assets | 6,965 |  |  |
Business Acquisition, Purchase Price Allocation, Goodwill Amount | 31,951 |  |  |
Business Acquisition, Purchase Price Allocation, Current Liabilities, Accounts Payable | (98,967) |  |  |
Business Acquisition, Purchase Price Allocation, Current Liabilities, Accrued Liabilities | (18,900) |  |  |
Business Acquisition, Purchase Price Allocation, Other Noncurrent Liabilities | (4,080) |  |  |
Business Acquisition, Cost of Acquired Entity, Purchase Price | 379,013 |  |  |
Intechra Shared and Converge Combined [Member] |  |  |  |
Intangible Assets Acquired As Part Of Business Combination [Line Items] |  |  |  |
Business Acquisition, Purchase Price Allocation, Current Assets, Receivables |  |  | 91,001 |
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets |  |  | 146,200 |
Business Acquisition, Purchase Price Allocation, Current Assets, Inventory |  |  | 11,785 |
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment |  |  | 11,187 |
Business Acquisition, Purchase Price Allocation, Other Noncurrent Assets |  |  | 8,615 |
Business Acquisition, Purchase Price Allocation, Goodwill Amount |  |  | 342,446 |
Business Acquisition, Purchase Price Allocation, Current Liabilities, Accounts Payable |  |  | (38,961) |
Business Acquisition, Purchase Price Allocation, Current Liabilities, Accrued Liabilities |  |  | (46,328) |
Business Acquisition, Purchase Price Allocation, Other Noncurrent Liabilities |  |  | (38,552) |
Business Acquisition, Cost of Acquired Entity, Purchase Price |  |  | 487,393 |
Customer Relationships [Member] | RFPD and NuHorizons Combined [Member] |  |  |  |
Intangible Assets Acquired As Part Of Business Combination [Line Items] |  |  |  |
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets | 35,400 |  |  |
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life | 8 |  |  |
Customer Relationships [Member] | Intechra Shared and Converge Combined [Member] |  |  |  |
Intangible Assets Acquired As Part Of Business Combination [Line Items] |  |  |  |
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets |  |  | 59,800 |
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life | 10 |  |  |
Trade Names [Member] | RFPD and NuHorizons Combined [Member] |  |  |  |
Intangible Assets Acquired As Part Of Business Combination [Line Items] |  |  |  |
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets | 49,000 |  |  |
Trade Names [Member] | Intechra Shared and Converge Combined [Member] |  |  |  |
Intangible Assets Acquired As Part Of Business Combination [Line Items] |  |  |  |
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets |  |  | 78,000 |
Developed Technology [Member] | Intechra Shared and Converge Combined [Member] |  |  |  |
Intangible Assets Acquired As Part Of Business Combination [Line Items] |  |  |  |
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets |  |  | 1,700 |
Other Intangibles [Member] | RFPD and NuHorizons Combined [Member] |  |  |  |
Intangible Assets Acquired As Part Of Business Combination [Line Items] |  |  |  |
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets | 6,500 | [1] |  |
Acquired Finite-lived Intangible Asset, Useful Life, Minimum | 1 |  |  |
Acquired Finite-lived Intangible Asset, Useful Life, Maximum | 3 |  |  |
Other Intangibles [Member] | Intechra Shared and Converge Combined [Member] |  |  |  |
Intangible Assets Acquired As Part Of Business Combination [Line Items] |  |  |  |
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets |  |  | $ 6,700 | [2]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life | 10 |  |  |
Acquired Finite-lived Intangible Asset, Useful Life, Minimum |  |  | 1 |
Acquired Finite-lived Intangible Asset, Useful Life, Maximum |  |  | 2 |
[1] | Consists of non-competition agreements and sales backlog with useful lives ranging from one to three years
[2] | Consists of non-competition agreements and sales backlog with useful lives ranging from one to two years

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- Definition The calculated weighted-average amortization period of a major class of finite-lived intangible assets acquired during the current period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 44 -Subparagraph a(3) -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16265-109275 + Details
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- Definition The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -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. + Details
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- Definition The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 52 -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. + Details
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- Definition The amount of acquisition cost of a business combination allocated to inventory, including finished goods, work-in-process, and raw materials. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -Subparagraph c -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. + Details
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- Definition The amount of acquisition cost of a business combination allocated to receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -Subparagraph b -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. + Details
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- Definition The amount of acquisition cost of a business combination allocated to accounts payable of the acquired entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -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. + Details
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- Definition The amount of acquisition cost of a business combination allocated to accrued expenses of the acquired entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -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. + Details
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- Definition Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 52 -Subparagraph c -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 53 -Subparagraph d -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. + Details
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- Definition The amount of acquisition cost of a business combination allocated to noncurrent assets of the acquired entity, except for property plant and equipment, intangible assets, and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 98-1 -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. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -Subparagraph f -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. + Details
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- Definition The amount of acquisition cost of a business combination allocated to property, plant and equipment to be used in ongoing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -Subparagraph d -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. + Details
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