Details Of Certain Accounts (Accrued Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Details Of Certain Accounts [Abstract]
Accrued payroll and related benefits	$ 34,721	$ 51,561
Current asset retirement obligations	4,048	2,898
Unearned revenue	6,964	6,137
Billing in excess of cost	4,625	6,445
Accrued interest	7,699	17,451
Derivative liability (Note 16)	2,008	16,266
Taxes payable excluding income tax payable	5,788	5,164
Pipelay assets sale deposit (Note 2)	50,000	50,000
Other	6,171	5,592
Total accrued liabilities	$ 122,024	$ 161,514