Income Taxes (Components Of The Net Deferred Income Tax Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Components of Deferred Tax Assets and Liabilities [Abstract]
Property and Equipment	$ 343,411	$ 328,355
Long-term Debt	56,587	36,864
Unremitted earnings of foreign subsidiaries	40,321	41,382
Investments in 50% or Less Owned Companies	23,573	24,392
Other	9,050	7,235
Total deferred tax liabilities	472,942	438,228
Share award plans	8,347	6,920
Other	13,662	14,801
Total deferred tax assets	22,009	21,721
Valuation allowance	6,778	5,990
Net deferred tax assets	15,231	15,731
Net deferred tax liabilities	$ 457,711	$ 422,497