Right-of-Use Asset and Lease Liabilities - Balance Sheet Classification of Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
ASSETS
Operating lease assets	$ 159,439	$ 156,741
Finance lease assets	12,866	14,770
Total leased assets	172,305	171,511
Current liabilities:
Operating	29,949	27,156
Finance	6,539	6,924
Noncurrent liabilities
Operating	140,120	139,200
Finance	7,250	8,746
Total lease liabilities	183,858	182,026
Operating lease accumulated amortization	31,200	23,200
Finance lease accumulated depreciation	$ 7,900	$ 6,000