Leases - Leasing Activities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating Cash Flows for Finance Leases	$ 411
Operating Cash Flows for Operating Leases	126,361
Financing Cash Flows for Finance Leases	2,493
Total Cash paid for amounts included in measurement of Lease Liabilities	129,265
Right-of-Use Assets obtained in exchange for new Finance Lease Liabilities	0
Right-of-Use Assets obtained in exchange for new Operating Lease Liabilities	$ 53,883