Leases - Schedule of Components of Lease Expense (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Lease Cost
Operating lease cost	$ 4,752
Short-term lease cost	294
Variable lease cost	119
Total lease cost	5,165
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	4,597
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases	$ 3,670
Weighted-average remaining lease term- operating leases	9 years 2 months 15 days
Weighted-average discount rate - operating leases	5.01%