Fair Value Measurements - Reconciliation of Contingent Payments (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in fair value of acquisition-related contingent consideration	$ (290)	$ 0
Contingent Consideration Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	12,940	0
Acquisition-related contingent consideration incurred during period	0	15,990
Changes in fair value of acquisition-related contingent consideration	(290)	0
Ending balance	12,650	$ 15,990
Geneva Healthcare, Inc. \| Level 3 \| Contingent Consideration Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in fair value of acquisition-related contingent consideration	$ (300)

Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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