Leases (Supplemental Balance Sheet Information Related To Leases) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 157,843	$ 0
Operating lease liabilities	161,512
Finance Leases	10,080
Amortization depreciation	(584)
Accumulated Depreciation [Member]
Lessee, Lease, Description [Line Items]
Amortization depreciation	(638)
Property And Equipment, At Cost [Member]
Lessee, Lease, Description [Line Items]
Finance Leases	12,377
Property And Equipment, Net [Member]
Lessee, Lease, Description [Line Items]
Finance Leases	11,739
Loans Payable And Other Financial Liabilities [Member]
Lessee, Lease, Description [Line Items]
Finance Leases	$ 10,080