Commitments - Right-of-use Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets
Operating	$ 107,304	$ 66,932
Financing	2,672	1,453
Total leased assets	109,976	68,385
Current:
Operating	7,031	5,567
Financing	1,160	672
Long-term:
Operating	116,496	73,153
Financing	1,645	905
Total lease liabilities	$ 126,332	$ 80,297
Weighted-average remaining lease term (years) - operating leases	13 years 4 months 24 days	12 years 4 months 24 days
Weighted-average remaining lease term (years) - finance leases	2 years 2 months 12 days	2 years 3 months 18 days
Weighted-average discount rate - operating leases	5.50%	7.30%
Weighted-average discount rate - finance leases	4.20%	5.40%