XML 26 R42.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Acquisitions (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2012
--- | ---
Human Concepts [Member] |
Business Acquisition [Line Items] |
Current year or prior year payment based on terms of the agreement | $ 1.2 nsp_AdditionalPaymentsPaidInCurrentYearOrPriorFiscalYearAsPurchasePriceConsideration / us-gaap_BusinessAcquisitionAxis = nsp_HumanConceptsMember
Galaxy Technologies, Inc. [Member] |
Business Acquisition [Line Items] |
Current year or prior year payment based on terms of the agreement | $ 1.4 nsp_AdditionalPaymentsPaidInCurrentYearOrPriorFiscalYearAsPurchasePriceConsideration / us-gaap_BusinessAcquisitionAxis = nsp_GalaxyTechnologiesIncMember

X
- Definition The amount paid in the current fiscal year or paid in the prior fiscal year as additional payments based on the terms of the agreement. + References No definition available. + Details
Name: | nsp_AdditionalPaymentsPaidInCurrentYearOrPriorFiscalYearAsPurchasePriceConsideration
Namespace Prefix: | nsp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=nsp_GalaxyTechnologiesIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=nsp_HumanConceptsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |