Operating and Capital Lease Commitments and Total Rents - Lease Costs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) lease
Lease cost:
Number of operating leases | lease	553
Operating Lease, Cost	$ 19,365
Short-term Lease, Cost	4,741
Variable Lease, Cost	335
Total lease cost	24,441
Operating cash flows from operating leases	19,040
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 13,341
Operating Lease, Weighted Average Remaining Lease Term	3 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	9.00%
Maximum
Lease cost:
Initial term	12 months