Leases - Supplemental Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Cash paid for amounts included in measurement of liabilities:
Operating leases	$ 5,052	$ 2,752	$ 10,484	$ 10,550
Finance leases	2,957	3,512	6,023	6,794
Right-of-use assets obtained in exchange for new lease liabilities:
Operating leases	14,428	625	19,654	70,055
Finance leases	0	$ 6,718	$ 0	$ 64,139
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