Leases - Lease Maturities (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Leases [Abstract]
For the remaining nine months ending December 31, 2019	$ 4,075
2020	4,624
2021	3,588
2022	2,089
2023	1,440
Thereafter	4,625
Total future lease payments	20,441
Imputed interest	(2,951)
Total	$ 17,490