Business Acquisition Contingent Consideration At Fair Value Accrued Earn-Out

No definition available.

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- Definition

The amount of goodwill recognized as of the acquisition date.

+ References

No definition available.

+ Details

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- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents the maximum amount of consideration which may be paid.

+ References

No definition available.

+ Details

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- Definition

With respect to a business combination completed during the period, this element provides a description of the business, other than the name, which may include the industry, size, products and other important information.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

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- Definition

Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 25

-Paragraph 6

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Acquisition Date

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-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (b)

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+ Details

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- Details

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- Definition

Name of the acquired entity.

+ References

+ Details

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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 Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 25

-Paragraph 23

-URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 7

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-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

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+ Details

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Balance Type:	credit
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- Definition

This element represents a description of the primary reason for the business combination which may consist of general categories such as top-line growth, synergistic benefits, market share, and diversification and the more detailed factors that might apply.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)

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- Definition

Amount of assets acquired at the acquisition date.

+ References

+ Details

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Period Type:	instant

- Definition

Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

+ References

+ Details

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- Definition

Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

+ References

+ Details

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Period Type:	instant

- Definition

Amount of liabilities assumed at the acquisition date.

+ References

+ Details

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- Definition

Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

+ References

+ Details

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- Definition

Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

+ References

+ Details

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- Definition

The amount of property, plant, and equipment recognized as of the acquisition date.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

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-Section 55

-Paragraph 37

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- Definition

Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

+ References

+ Details

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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-Section 45

-Paragraph 13

-Subparagraph (b)

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Acquisitions (Schedule of Purchase Price Allocation) (Details) (USD $)	0 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended	0 Months Ended	3 Months Ended	12 Months Ended
	Dec. 02, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	May 15, 2012	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2014	Dec. 05, 2013
Business Acquisition [Line Items]
contingent consideration maximum								$ 16,000,000asgn_Contingentconsiderationmaximum
CyberCoders [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets									915,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets									11,329,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill									37,860,000
Business Acquisition, Effective Date of Acquisition		Dec. 05, 2013
Business Acquisition, Name of Acquired Entity		CyberCoders Holdings, Inc
Business Acquisition, Description of Acquired Entity		a provider of permanent placement services headquartered in Irvine, California.
Business Combination, Reason for Business Combination		The primary reason for the acquisition was to expand the Company's permanent placement services.
Business Combination, Consideration Transferred		96,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment									3,327,000
BusinessCombinationRecognizedGoodwill									69,018,000
Goodwill, Acquired During Period			69,018,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets									122,449,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities									9,022,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other									16,839,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities									25,861,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net									96,588,000
Business Acquisition, Cost of Acquired Entity, Cash Paid		93,600,000
Business Acquisition Contingent Consideration At Fair Value Accrued Earn-Out	700,000	3,000,000
contingent consideration maximum									11,000,000
Business Combination, Acquisition Related Costs			1,500,000
Whitaker [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	568,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	9,155,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	7,750,000
Business Acquisition, Effective Date of Acquisition				Dec. 02, 2013
Business Acquisition, Name of Acquired Entity				Whitaker Medical, LLC
Business Acquisition, Description of Acquired Entity				a provider of physician staffing services headquartered in Houston, Texas.
Business Combination, Reason for Business Combination				The primary reason for the acquisition was to expand the Company's Physician staffing services.
Business Combination, Consideration Transferred				19,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	272,000
BusinessCombinationRecognizedGoodwill	7,076,000
Goodwill, Acquired During Period			7,076,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	24,821,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	5,093,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	551,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	5,644,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	19,177,000
Business Acquisition, Cost of Acquired Entity, Cash Paid				18,500,000
contingent consideration maximum	5,000,000
Business Combination, Acquisition Related Costs			400,000
Apex Systems
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets					494,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets					172,042,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					251,555,000
Business Acquisition, Effective Date of Acquisition					May 15, 2012
Business Acquisition, Name of Acquired Entity					Apex Systems, Inc.
Business Acquisition, Description of Acquired Entity					a privately-owned provider of information technology staffing headquartered in Richmond, Virginia.
Business Combination, Reason for Business Combination					The primary reason for the acquisition was to expand the Company's information technology staffing services.
Business Combination, Consideration Transferred					610,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment					902,000
BusinessCombinationRecognizedGoodwill					264,590,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets					689,583,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities					77,905,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other					850,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities					78,755,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net					610,828,000
Business Acquisition, Cost of Acquired Entity, Cash Paid					385,000,000	300,000
Business Combination, Acquisition Related Costs							9,800,000
Contractor Relations [Member] \| CyberCoders [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill									4,000,000
Contractor Relations [Member] \| Whitaker [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	1,100,000
Contractor Relations [Member] \| Apex Systems
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					10,589,000
Customer Relationships [Member] \| CyberCoders [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill									860,000
Customer Relationships [Member] \| Whitaker [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	6,200,000
Customer Relationships [Member] \| Apex Systems
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					92,147,000
Noncompete Agreements [Member] \| CyberCoders [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill									800,000
Noncompete Agreements [Member] \| Whitaker [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	50,000
Noncompete Agreements [Member] \| Apex Systems
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					2,076,000
Software [Member] \| CyberCoders [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill									18,900,000
Trademarks [Member] \| CyberCoders [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill									13,300,000
Trademarks [Member] \| Whitaker [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	400,000
Trademarks [Member] \| Apex Systems
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					$ 146,743,000