Lease Accounting - Lessee, Other Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ (24,992)
Operating cash flows from finance leases	(2,941)
Operating cash flows from finance leases	(13,339)
Right-of-use assets obtained in exchange for lease obligations
Operating leases	12,492	$ 0	$ 0
Finance leases	$ 30,416	$ 13,290	$ 18,614
Weighted-average remaining lease term (years)
Operating leases	6 years 1 month 6 days
Finance leases	4 years 4 months 24 days
Weighted-average discount rate
Operating leases	4.10%
Finance leases	5.50%