Leases - Narrative (Details)	9 Months Ended
	Sep. 30, 2019 ft²
Lessee, Lease, Description [Line Items]
Building Acquired, Number of Square Feet	202,000
Number of Square Feet Occupied	41,000
Minimum
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Remaining Lease Term	6 months
Maximum
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Remaining Lease Term	19 years 8 months 12 days
Lessee, Operating Lease, Option to Extend	10 years
Lessee, Operating Lease, Option to Terminate	1 year