XML 101 R49.htm IDEA: XBRL DOCUMENT
v2.4.0.6

401(k) Retirement Savings Plan, Deferred Compensation Plan and Change in Control Severance Plan (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  | 12 Months Ended | 0 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 Vice President or Higher [Member] | Dec. 31, 2012 Chief Executive Officer [Member] | Dec. 31, 2012 2008 Amended and Restated CIC Agreement [Member] Chief Executive Officer [Member] | May 15, 2012 Apex Systems | Dec. 31, 2012 Apex Systems Long-term incentive program | May 15, 2012 Apex Systems Long-term incentive program
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |  |  |  |  |  |  |
Minimum service period for employee eligibility | 3 months |  |  |  |  |  | 12 months |  |
Minimum hours of work |  |  |  |  |  |  | 1000 hours |  |
Minimum age |  |  |  |  |  |  | 18 years |  |
Employer contributions to 401(k) plans | $ 3.7 | $ 1.1 | $ 0.4 |  |  |  |  |  |
Deferred compensation liability |  | 1.9 |  |  |  |  |  |  |
Cash surrender value of life insurance |  | 2.1 |  |  |  |  |  |  |
Proceeds from cash surrender value of life insurance policies | 1.5 |  |  |  |  |  |  |  |
Distributions to deferred compensation plan participants | 1.2 |  |  |  |  |  |  |  |
Long-term incentive program, maximum award |  |  |  |  |  |  |  |  | 10.0
Long-term incentive plan accrual |  |  |  |  | $ 2.0 |  |  | $ 10.0 | $ 7.9
Executive Change of Control Agreement, Involuntary Termination Period |  |  |  | 18 months |  | 6 months 10 days |  |  |

X
- Definition Deferred Compensation Arrangement, Maximum Award + References No definition available. + Details
Name: | asgn_DeferredCompensationArrangementMaxAward
Namespace Prefix: | asgn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Defined Contribution Plan, Employee Eligibility, Minimum Age + References No definition available. + Details
Name: | asgn_DefinedContributionPlanEmployeeEligibilityMinimumAge
Namespace Prefix: | asgn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Contribution Plan, Employee Eligibility, Minimum Hours of Work + References No definition available. + Details
Name: | asgn_DefinedContributionPlanEmployeeEligibilityMinimumHoursOfWork
Namespace Prefix: | asgn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Contribution Plan, Employee Eligibility, Minimum Service Period + References No definition available. + Details
Name: | asgn_DefinedContributionPlanEmployeeEligibilityMinimumServicePeriod
Namespace Prefix: | asgn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Executive Change of Control Agreement, Involuntary Termination Period + References No definition available. + Details
Name: | asgn_ExecutiveChangeOfControlAgreementInvoluntaryTerminationPeriod
Namespace Prefix: | asgn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Technical Bulletin (FTB) -Number 85-4 -Paragraph 2 -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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6812-107765 + Details
Name: | us-gaap_CashSurrenderValueOfLifeInsurance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of distributions made to the individual during the period. + References No definition available. + Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64, 65 -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 710 -SubTopic 10 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 6, 7 -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
Name: | us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. + References No definition available. + Details
Name: | us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow associated with the sale of insurance policy investment assets during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15, 16 -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
Name: | us-gaap_ProceedsFromSaleOfInsuranceInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration