Leases - Schedule of Lease Cost (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Leases [Abstract]
Short-term lease cost	$ 2,700,000	$ 11,400,000
Operating lease cost	1,800,000	4,900,000
Total lease cost	4,500,000	16,300,000
Cash paid for amounts included in the measurement of lease liabilities	1,500,000	3,800,000
ROUAs obtained in exchange for lease obligations	$ 1.5	$ 3.0
Weighted average remaining lease term	6 years 8 months 12 days	6 years 8 months 12 days
Weighted average discount rate	3.90%	3.90%