Leases - Schdeule of Lease Costs (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Lease costs	$ 1,410	[1]
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	1,522
Leased assets exchanged for new operating lease liabilities	$ 268
Weighted-average remaining terms (years)	3 years 7 months 17 days
Weighted-average discount rate	4.14%

[1] Excludes short-term leases and variable lease costs, which are immaterial.