Lease - Schedule of Reconciliation of Future Undiscounted Cash Flows to Operating Lease Liabilities After Adoption of 842 (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Operating Lease Liabilities, Payments Due [Abstract]
2019 (excluding the six months ended June 30, 2019)	$ 5,002
2020	8,171
2021	5,809
2022	4,614
2023	4,045
Thereafter	9,810
Total future lease payments	37,451
Less: imputed interest	(4,958)
Total operating lease liabilities	32,493
Less: current portion of lease liabilities	(9,078)	$ 0
Long-term portion of operating lease liabilities	$ 23,415	$ 0