XML 43 R19.htm IDEA: XBRL DOCUMENT v3.24.3

Stockholders' Equity Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2024

Equity, Attributable to Parent [Abstract]

Quarterly dividends declared [Table Text Block]

The Board declared and paid quarterly dividends as follows:

(amounts per share)			2024						2023
First quarter			$	0.57					$	0.52
Second quarter			0.60						0.57
Third quarter			0.60						0.57

X

- Definition

Quarterly dividends declared [Table Text Block] - tabular disclosure of all or some of the information related to dividends declared and paid as of the financial reporting date.

+ References

No definition available.

+ Details

Name:	nsp_QuarterlydividendsdeclaredTableTextBlock
Namespace Prefix:	nsp_
Data Type:	dtr-types1:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_StockholdersEquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration