Leases Leases (ROU Assets and Lease Liabilities) (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating lease right-of-use assets		$ 139,907	$ 110,000	$ 0
Total leased right-of-use assets		154,351		17,159
Current portion of operating lease liabilities		26,147		0
Noncurrent portion of operating lease liabilities		120,832		0
Finance Lease, Liability, Noncurrent		6,959		8,845
Noncurrent portion of finance lease obligations				8,845
Total lease liabilities		159,515		15,506
Property And Equipment [Member]
Finance lease right-of-use assets	[1]	14,444		17,159
Finance lease ROU assets accumulated amortization		43,700		42,500
Current Portion Of Long-Term Debt And Finance Lease Obligations [Member]
Current portion of finance lease liabilities		$ 5,577		$ 6,661

[1] Finance lease right-of-use assets are presented net of accumulated amortization of $43.7 million and $42.5 million as of December 31, 2019 and 2018, respectively.