Commitments and Contingencies (Leases) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 40,551	$ 0
Finance Lease, Right-of-Use Asset	1,299
Lease, Right-of-Use Asset	41,850
Operating Lease, Liability, Current	7,663	0
Finance Lease, Liability, Current	124
Operating Lease, Liability, Noncurrent	44,015	$ 0
Finance Lease, Liability, Noncurrent	54
Lease, Liability	51,856
Other Noncurrent Liabilities [Member]
Lessee, Lease, Description [Line Items]
Finance Lease, Liability, Current	$ 124