Commitments and Contingencies - Schedule of Additional Leases Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Supplemental Income Statement Information:
Operating lease cost	$ 4,133
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	4,868
Right-of-use assets obtained in exchange for lease obligations:	$ 1,172
Other Information
Weighted-average remaining lease term - operating leases	5 years 2 months 4 days
Weighted-average discount rate - operating leases	4.00%