CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash Flows from Operating Activities:
Net Income (Loss)	$ 7,801	$ (93,413)
Adjustments to Reconcile Net Income (Loss) to Net Cash Provided by Operating Activities:
Depreciation and Amortization	83,764	85,373
Stock-Based Compensation Expense	5,169	3,274
Deferred Income Taxes	(20,812)	(30,308)
Provision (Benefit) For Doubtful Accounts Receivable	356	(7,625)
Gain on Equity Investment	(14,876)	0
Asset Impairment	44,370	47,523
Other	5,328	(2,287)
(Increase) Decrease in Operating Assets -
Accounts Receivable	(12,053)	20,540
Prepaid Expenses and Other	495	(11,141)
Increase (Decrease) in Operating Liabilities -
Accounts Payable	17,370	16,039
Insurance Notes Payable	(12,158)	(11,167)
Other Current Liabilities	(22,118)	6,942
Other Liabilities	8,971	866
Net Cash Provided by Operating Activities	91,607	24,616
Cash Flows from Investing Activities:
Acquisition of Assets, Net of Cash Acquired	(178,136)	(40,000)
Investment in Marketable Securities, Net	0	(30,000)
Additions of Property and Equipment	(74,912)	(47,478)
Deferred Drydocking Expenditures	(5,787)	(7,285)
Insurance Proceeds Received	0	20,639
Proceeds from Sale of Assets, Net	8,797	10,405
Decrease in Restricted Cash	0	1,622
Net Cash Used in Investing Activities	(250,038)	(92,097)
Cash Flows from Financing Activities:
Long-term Debt Borrowing	0	500,000
Long-term Debt Repayments	0	(452,909)
Redemption of 3.375% Convertible Senior Notes	(61,274)	(27,606)
Common Stock Issuance	0	96,696
Payment of Debt Issuance Costs	0	(7,717)
Other	1,170	139
Net Cash Provided by (Used In) Financing Activities	(60,104)	108,603
Net Increase (Decrease) in Cash and Cash Equivalents	(218,535)	41,122
Cash and Cash Equivalents at Beginning of Period	259,193	134,351
Cash and Cash Equivalents at End of Period	$ 40,658	$ 175,473