XML 67 R26.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Deposits Deposits (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Statement of Financial Position [Abstract] |
Deposit Asset, Type [Table Text Block] | Deposits and prepaid health insurance consisted of the following:
| December 31,
(in thousands) | 2019 |  | 2018
Prepaid health insurance | $ | 9,000 |  |  | $ | 9,000 |
Deposits – health insurance | 8,100 |  |  | 6,200 |
Deposits – workers’ compensation | 175,913 |  |  | 166,474 |
Deposits and prepaid health insurance | $ | 193,013 |  |  | $ | 181,674 |

X
- Definition Deposit Asset, Type [Table Text Block] + References No definition available. + Details
Name: | nsp_DepositAssetTypeTableTextBlock
Namespace Prefix: | nsp_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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