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Acquisition - Narrative (Details) - Teachers On Call, Inc. - USD ($) $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Sep. 05, 2017 | Apr. 01, 2018 | Jul. 01, 2018
Business Acquisition [Line Items] |  |  |
Ownership percentage acquired | 100.00% |  |
Purchase price of acquisition | $ 41.0 |  |
Purchase price paid at closing | 39.0 |  |
Working capital adjustment |  | $ 0.2 |
Goodwill expected to be deductible |  |  | $ 18.8
Indemnification asset recognized at acquisition | $ 2.8 |  |
Indemnification assets |  |  | $ 0.1

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