Commitments and Contingencies (Operating Lease Payments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating Leased Assets [Line Items]
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 17,000
Operating Lease, Weighted Average Discount Rate, Percent	4.70%
Operating Lease, Weighted Average Remaining Lease Term	4 years 7 months 6 days
Operating Leases, Future Minimum Payments, Due in Two Years		$ 17,505
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2017	$ 14,549
Total minimum lease payments	43,191
lessee, operating lease, interest due	(4,780)
Operating Lease, Liability, Current	12,857	0
Operating Lease, Liability, Noncurrent	30,334	0
Operating Leases, Future Minimum Payments, Due in Two Years		15,418
Operating Leases, Future Minimum Payments, Due in Three Years		12,703
Operating Leases, Future Minimum Payments, Due in Four Years		6,735
Operating Leases, Future Minimum Payments, Due in Five Years		4,641
Operating Leases, Future Minimum Payments, Due Thereafter		12,462
Operating Leases, Future Minimum Payments Due		$ 69,464
Operating Lease, Payments	19,700
Property Subject to Operating Lease [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2018	10,425
2019	6,764
2020	6,138
2021	4,940
2022 and beyond	5,155
Lessee, Operating Lease, Liability, Payments, Due	$ 47,971