Leases (Schedule of Lease Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
Schedule of Lease Liabilities [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 30,983
Lessee, Operating Lease, Liability, Payments, Due Year Two	27,098
Lessee, Operating Lease, Liability, Payments, Due Year Three	7,355
Lessee, Operating Lease, Liability, Payments, Due Year Four	3,645
Lessee, Operating Lease, Liability, Payments, Due Year Five	3,680
Lessee, Operating Lease, Liability, Payments, Due after Year Five	21,499
Lessee, Operating Lease, Liability, Payments, Due	94,260
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(16,249)
Operating Lease, Liability	78,011	$ 75,200
Finance Lease, Liability, Payments, Remainder of Fiscal Year	1,669
Finance Lease, Liability, Payments, Due Year Two	1,475
Finance Lease, Liability, Payments, Due Year Three	275
Finance Lease, Liability, Payments, Due Year Four	234
Finance Lease, Liability, Payments, Due Year Five	233
Finance Lease, Liability, Payments, Due after Year Five	39
Finance Lease, Liability, Payments, Due	3,925
Finance Lease, Liability, Undiscounted Excess Amount	(547)
Finance lease liability	$ 3,378