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Income Taxes - Additional Information (Detail) - USD ($) | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Income Taxes Disclosure [Line Items] |  |
Income tax provision | $ 1,858,000 | $ 1,411,000
Effective tax rate for continuing operations | 21.00% | 23.00%
Additional income tax expense for tax deficiencies associated with stock based awards | $ 26,000 |
Reduction in income tax expense for excess tax benefits associated with stock based awards |  | $ 83,000
NurseGrid [Member] |  |
Income Taxes Disclosure [Line Items] |  |
Income tax provision | (300,000) |
Change in fair value of non-marketable equity investments | $ 1,200,000 |

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