Leases - Future Minimum Lease Payments (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Operating Leases
2019	$ 4,870
2020	17,721
2021	12,798
2022	9,591
2023	7,871
Thereafter	29,440
Total lease payments	82,291
Less imputed interest	(22,227)
Total operating lease liabilities	$ 60,064