Lease - Schedule of Supplemental Information Related to Leases (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease right-of-use assets	$ 28,867	$ 0
Current portion of operating lease liabilities	9,078	0
Non-current portion of operating lease liabilities	23,415	$ 0
Total operating lease liabilities	32,493
Cash paid for amounts included in the measurement of operating lease liabilities	5,006,000
Right-of-use assets obtained in exchange for operating lease liabilities	$ 2,146,000
Weighted-average remaining lease term for operating leases (years)	5 years 9 months 30 days
Weighted-average discount rate for operating leases	4.77%