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Acquisition - Narrative (Details) - Teachers On Call, Inc. $ in Millions | Sep. 05, 2017 USD ($) Rate
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Business Acquisition [Line Items] |
Ownership percentage acquired | Rate | 100.00%
Purchase price of acquisition | $ 41.0
Purchase price paid at closing | 39.0
Intangible assets acquired | 18.3
Goodwill expected to be deductible | 18.3
Indemnification asset recognized | 2.8
Trademarks |
Business Acquisition [Line Items] |
Indefinite-lived intangibles | 4.8
Customer relationships |
Business Acquisition [Line Items] |
Finite-lived intangibles | $ 12.0
Useful life of intangible assets acquired | 10 years
Candidate database |
Business Acquisition [Line Items] |
Finite-lived intangibles | $ 1.5
Useful life of intangible assets acquired | 4 years

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