Fair Value Measurements (Estimated Fair Value Of Other Financial Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents and restricted cash, Carrying Amount	$ 319,373
Investments, at cost, in 50% or less owned companies (included in other assets), Carrying Amount	9,315
Notes receivable from other business ventures (included in other receivables and other assets)	40,900
Long-term debt, including current portion, Carrying Amount	965,456
Debt Instrument, Fair Value Disclosure	0
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	319,373
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0
Debt Instrument, Fair Value Disclosure	992,255
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0
Debt Instrument, Fair Value Disclosure	$ 0