Leases - Future Minimum Lease Payments Under Previous Guidance (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Lease Commitments
2019	$ 9,220
2020	8,716
2021	7,145
2022	7,362
2023	7,621
Thereafter	22,532
Total minimum lease payments	62,596
Operating Leases, Future Minimum Payments Receivable [Abstract]
2019	2,180
2020	1,282
2021	0
2022	0
2023	0
Thereafter	0
Total minimum lease payments	$ 3,462