Commitments (Details) $ in Thousands	Sep. 30, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Future Minimum Payments, Remainder of Fiscal Year	$ 19,731
Operating Leases, Future Minimum Payments, Due in Two Years	70,736
Operating Leases, Future Minimum Payments, Due in Three Years	58,479
Operating Leases, Future Minimum Payments, Due in Four Years	41,107
Operating Leases, Future Minimum Payments, Due in Five Years	31,585
Operating Leases, Future Minimum Payments, Due Thereafter	72,412
Operating Leases, Future Minimum Payments Due, Total	$ 294,050