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Leases - Additional Information (Details)
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
Lessee Lease Description [Line Items]  
Operating leases, option to extend lease The leases may include options to extend the lease periods for up to 5 years
Operating leases, existence of option to extend true
Operating leases, option to terminate lease options to terminate the leases within 1 year
Operating leases, existence of option to terminate true
Operating leases, residual value guarantee description The leases may include a residual value guarantee or a responsibility to return the property to its original state of use.
Operating leases, existence of residual value guarantee true
Additional operating leases not yet commenced, value $ 16.6
Minimum  
Lessee Lease Description [Line Items]  
Operating leases, remaining lease term 1 year
Additional operating leases not yet commenced, lease terms 1 year
Maximum  
Lessee Lease Description [Line Items]  
Operating leases, remaining lease term 29 years
Operating leases, extendable lease term 5 years
Operating leases, termination lease term 1 year
Additional operating leases not yet commenced, lease terms 28 years