Leases (Supplemental Cash Flow And Balance Sheet Information) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Operating cash flows from operating leases (payments)	$ 56,845
Right-of-use assets obtained in exchange for new operating lease liabilities	33,263
Lease right-of-use-assets	361,603	$ 369,333	$ 0
Current lease liabilities	80,628	86,747	0
Noncurrent lease liabilities	323,466	$ 331,520	$ 0
Total lease liabilities	$ 404,094
Operating lease, weighted average remaining lease term	6 years 9 months 18 days
Operating lease, weighted average discount rate	4.00%