Leases - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Net investment in lease	$ 8,967
Net investment in lease, current	7,164
Residual value of leased asset	2,408
Net investment in lease, noncurrent	605
Lease income	81
Right-of-use asset	52,478
Operating lease, liability	56,049
Lease cost	2,581
Affiliated Entity
Lessee, Lease, Description [Line Items]
Right-of-use asset	13,773
Operating lease, liability	16,012
Lease cost	$ 492
Minimum
Lessee, Lease, Description [Line Items]
Renewal term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Renewal term	20 years