Right-of-Use Asset and Lease Liabilities - Lease Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Maturity Of Operating Lease Liabilities
2020	$ 29,148
2021	38,190
2022	37,145
2023	29,378
2024	25,549
Thereafter	43,126
Total lease payments	202,536
Less: imputed interest	(32,467)
Total lease obligations	170,069
Less: current obligations	(29,949)	$ (27,156)
Long-term lease obligations	140,120	139,200
Maturity Of Finance Lease Liabilities
2020	5,507
2021	4,659
2022	2,333
2023	1,581
2024	315
Thereafter	581
Total lease payments	14,976
Less: imputed interest	(1,187)
Total lease obligations	13,789
Less: current obligations	(6,539)	(6,924)
Long-term lease obligations	$ 7,250	$ 8,746