Leases - Lease Payment Maturity Schedule (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Operating Leases
2019	$ 30,508
2020	12,605
2021	3,705
2022	3,239
2023	3,234
Thereafter	7,680
Total lease payments	60,971
Less imputed interest	(4,060)
Total lease obligations	56,911
Less current obligations	(36,899)
Long-term lease obligations	20,012
Financing Leases
2019	943
2020	940
2021	548
2022	457
2023	0
Thereafter	0
Total lease payments	2,888
Less imputed interest	(99)
Total lease obligations	2,789
Less current obligations	(1,384)
Long-term lease obligations	$ 1,405