Leases - Lease costs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Lease, Cost [Abstract]
Total lease cost	$ 111,367
Cost of sales
Lease, Cost [Abstract]
Total lease cost	57,369
Short-term lease costs	2,500
Selling, general and administrative expenses
Lease, Cost [Abstract]
Total lease cost	3,094
Other Operating Income (Expense) [Member]
Lease, Cost [Abstract]
Total lease cost	50,904
Variable lease cost	$ 6,700