Leases - Summary of RIght-of-Use Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Operating lease right-of-use asset	$ 51,875	$ 53,274
Operating lease liabilities, current	3,468
Operating lease liabilities long-term	52,697
Total operating lease liabilities	$ 56,165	$ 58,024