XML 41 R25.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2016
Accounting Policies [Abstract] |
Estimated Useful Lives of Property and Equipment | Property and Equipment Property and equipment are recorded at cost and are depreciated over the estimated useful lives of the related assets using the straight-line method. The estimated useful lives of property and equipment for purposes of computing depreciation are as follows:
Buildings and improvements |  | 5-30 years
Computer hardware and software |  | 2-5 years
Software development costs |  | 3-5 years
Furniture, fixtures and other |  | 5-7 years
Activity and Balances Related to Incurred But Not Paid Worker's Compensation Claims | The following table provides the activity and balances related to incurred but not reported workers’ compensation claims:
|  | Year ended December 31,
|  | 2016 |  | 2015
|  | (in thousands)
Beginning balance |  | $ | 162,184 |  |  | $ | 136,088 |
Accrued claims |  | 65,069 |  |  | 67,559 |
Present value discount |  | (2,628 | ) |  | (3,095 | )
Paid claims |  | (40,697 | ) |  | (38,368 | )
Ending balance |  | $ | 183,928 |  |  | $ | 162,184 |
Current portion of accrued claims |  | $ | 42,637 |  |  | $ | 37,438 |
Long-term portion of accrued claims |  | 141,291 |  |  | 124,746 |
|  | $ | 183,928 |  |  | $ | 162,184 |

X
- Definition Disclosure of the incurred but not yet paid workers' compensation claims activities and balances. + References No definition available. + Details
Name: | nsp_ScheduleOfAccruedWorkersCompensationClaimsTableTextBlock
Namespace Prefix: | nsp_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of accounting policy for depreciation, depletion, and amortization of property and equipment costs, including methods used and estimated useful lives and how impairment of such assets is assessed and recognized. + References No definition available. + Details
Name: | us-gaap_DepreciationDepletionAndAmortizationPolicyTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration