CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Net Cash Provided by Operating Activities	$ 135,569	$ 120,840
Cash Flows from Investing Activities:
Capital Expenditures	(113,993)	(101,564)
Proceeds from Sale of Property, Plant and Equipment	3,500	0
Net Proceeds from Sale (Purchase) of Restricted Investments in Margin Account	743	(21,793)
Investment in Long-Term Receivables	(3,780)	(2,009)
Proceeds from Long-Term Receivables	4,297	1,213
Purchase of Company Owned Life Insurance	(4,352)	(4,276)
Investment in Affiliate	(23,034)	(2,700)
Return on Investment in Affiliate	1,902	0
Advances on Notes Receivable - Affiliate	(28,827)	(61,783)
Repayment of Notes Receivable - Affiliate	39,977	3,566
Other	(5,847)	0
Net Cash Used in Investing Activities	(129,414)	(189,346)
Cash Flows from Financing Activities:
Net Borrowings of Lines of Credit	12,150	27,600
Proceeds from Issuance of Long-Term Debt	0	60,000
Payments for Issuance of Long-Term Debt	(32)	(1,016)
Principal Repayments of Long-Term Debt	(25,000)	0
Dividends on Common Stock	(21,866)	(19,716)
Proceeds from Sale of Common Stock	5,359	0
Proceeds from Finance Obligation	23,482	0
Net Cash (Used in) Provided By Financing Activities	(5,907)	66,868
Net Increase (Decrease) in Cash and Cash Equivalents	248	(1,638)
Cash and Cash Equivalents at Beginning of Period	2,363	3,823
Cash and Cash Equivalents at End of Period	$ 2,611	$ 2,185