Related Party Transactions (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Polsinelli
Related Party Transaction [Line Items]
Legal services obtained	$ 6.5	$ 4.1	$ 0.8
Accounts payable for legal services	0.9	1.3	$ 0.1
Family member of the Company's Executive Vice President \| Legal services from Segal McCambridge Singer and Mahone
Related Party Transaction [Line Items]
Legal services obtained	$ 0.1	$ 0.5

Amount for accounts payable to related parties.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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