Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash Flows Provided By Operating Activities	$ 163,740	$ 212,616
Cash Flows from Investing Activities
Additions to fixed assets and computer software	(11,931)	(14,806)
Proceeds from sale of assets	23	15,391
Net cash (used in) provided by investing activities	(11,908)	585
Cash Flows from Financing Activities
Long-term debt repurchases and repayments	(323,500)	(155,001)
Debt issuance costs and other financing items, net	(2,812)	497
Decrease in checks not yet presented for payment	(542)	(16,905)
Net cash used in financing activities	(326,854)	(171,409)
(Decrease) increase in cash and cash equivalents	(175,022)	41,792
Cash and cash equivalents, beginning of period	257,939	127,852
Cash and cash equivalents, end of period	82,917	169,644
Supplemental Information:
Cash interest, net	87,834	104,566
Cash income taxes, net	3,701	5,524
Non-cash Financing Activities:
Reduction of debt from debt repurchases	$ 144,315	$ 0