Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Sep. 30, 2019	Mar. 31, 2019	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Increase (decrease) in contingent liability		$ (1.5)
Repayments of related party debt	$ 3.0		$ 1.0

Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Name:	us-gaap_IncreaseDecreaseInContractWithCustomerLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration