Leases - Supplemental Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Cash paid for amounts included in measurement of liabilities:
Operating leases	$ 6,212	$ 5,025	$ 16,696	$ 15,575
Finance leases	2,242	3,710	8,266	10,504
Right-of-use assets obtained in exchange for new lease liabilities:
Operating leases	9,838	446	29,492	70,501
Finance leases	0	$ 1,194	$ 0	$ 65,333
Finance lease, right of use asset, write off	17,600
Finance lease, liability, write off	15,000
Operating lease right of use asset recognized	14,500
Operating lease liability recognized	$ 11,900