XML 31 R40.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Incentive Award Plan and Employee Stock Purchase Plan (Details) (USD $) | 3 Months Ended | 6 Months Ended | 0 Months Ended |  | 0 Months Ended
--- | --- | --- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Mar. 31, 2014 2010 Employee Stock Purchase Plan (ESPP) | Mar. 26, 2014 Chief Executive Officer Performance Based Award | Mar. 26, 2014 Apex employees [Domain] Performance Based Award installment | Jun. 16, 2014 Other Executive Officers [Member] Performance Based Award | May 15, 2014 Other Executive Officers [Member] Performance Based Award | Mar. 26, 2014 Other Executive Officers [Member] Performance Based Award | Jan. 02, 2014 Tranche A [Member] Chief Executive Officer Performance Based Award | Mar. 26, 2014 Tranche B [Member] Chief Executive Officer Performance Based Award installment
Deferred Compensation Arrangement with Individual, Share-based Payments |  |  |  |  |  |  |  |  |  |  |  |
Share-based awards, grant date fair market value |  |  |  |  |  | $ 500,000 | $ 2,200,000 | $ 35,000 | $ 600,000 | $ 1,000,000 | $ 800,000 | $ 3,300,000
Share-based awards, grants in period |  |  |  |  |  |  | 60,244 | 976 | 16,596 | 27,141 | 23,255 | 91,569
Share-based awards, number of equal vesting components |  |  |  |  |  |  | 12 |  |  |  |  | 3
Employee stock purchase plan shares issued during period |  |  |  |  | 90,837 |  |  |  |  |  |  |
Allocated Share-based Compensation Expense | $ 4,100,000 | $ 3,500,000 | $ 7,300,000 | $ 6,000,000 |  |  |  |  |  |  |  |

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | asgn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantDateFairValue
Namespace Prefix: | asgn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Share-based Compensation Arrangement by Share-Based Payment Award, Number of Equal Vesting Components + References No definition available. + Details
Name: | asgn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfEqualVestingComponents
Namespace Prefix: | asgn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares issued during the period as a result of an employee stock purchase plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration