Leases - Future Minimum Obligations under Topic 842 (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Leases [Abstract]
2019	$ 78,289
2020	91,791
2021	76,050
2022	56,502
2023	42,406
Thereafter	149,099
Total lease payments	494,137
Less: imputed interest	122,233
Total	$ 371,904