Commitments and Contingencies (Operating Lease Payments) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Operating Leased Assets [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months		$ 16,674
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2017	$ 4,668
2018	15,706
2019	12,475
2020	8,883
2021	7,563
2022 and beyond	10,053
Total minimum lease payments	53,335	54,855
Lessee, Operating Lease, Liability, Payments, Due	59,348
lessee, operating lease, interest due	(6,013)
Operating Leases, Future Minimum Payments Due, Next Twelve Months	14,794	0
Operating Lease, Liability, Noncurrent	$ 38,541	0
Operating Leases, Future Minimum Payments, Due in Two Years		14,586
Operating Leases, Future Minimum Payments, Due in Three Years		11,875
Operating Leases, Future Minimum Payments, Due in Four Years		5,906
Operating Leases, Future Minimum Payments, Due in Five Years		3,813
Operating Leases, Future Minimum Payments, Due Thereafter		$ 2,001