CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash Flows from Operating Activities:
Net Income	$ 19,916	$ 35,162
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	40,083	40,815
Stock-Based Compensation Expense	2,400	2,737
Deferred Income Taxes	(4,616)	(36,616)
Other	3,089	1,947
(Increase) Decrease in Operating Assets -
Accounts Receivable	(3,834)	8,607
Prepaid Expenses and Other	9,879	(3,293)
Increase (Decrease) in Operating Liabilities -
Accounts Payable	1,887	13,751
Insurance Notes Payable	(9,568)	(9,123)
Other Current Liabilities	(16,119)	(3,325)
Other Liabilities	(2,472)	(1,983)
Net Cash Provided by Operating Activities	40,645	48,679
Cash Flows from Investing Activities:
Acquisition of Assets	0	(97,000)
Capital Expenditures	(40,665)	(44,973)
Proceeds from Sale of Assets, Net	1,679	2,748
Net Cash Used in Investing Activities	(38,986)	(139,225)
Cash Flows from Financing Activities:
Long-term Debt Borrowings	300,000	0
Redemption of 7.125% Senior Secured Notes	(220,072)	0
Cash Designated for Debt Retirement	(79,928)	0
Payment of Debt Issuance Costs	(2,961)	0
Other	108	768
Net Cash Provided by (Used In) Financing Activities	(2,853)	768
Net Decrease in Cash and Cash Equivalents	(1,194)	(89,778)
Cash and Cash Equivalents at Beginning of Period	198,406	259,193
Cash and Cash Equivalents at End of Period	$ 197,212	$ 169,415