CONSOLIDATED STATEMENT OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows provided by (used in) operating activities:
Net earnings	$ 168,655	$ 147,655	$ 150,215
Adjustments to reconcile net earnings to net cash flows provided by operating activities:
Depreciation and amortization	128,011	123,009	113,648
Deferred income taxes, net	75,763	51,891	116,481
Changes in operating assets and liabilities:
Accounts receivable	1,716	(10,242)	7,085
Inventory	4,027	1,332	12,692
Other assets	(1,714)	1,200	2,437
Accounts payable	(6,206)	10,678	4,970
Accrued taxes	4,151	(523)	7,757
Interest accrued	(18)	(827)	(736)
Other liabilities	(30,175)	(23,348)	(5,449)
Net cash flows provided by operating activities	344,210	300,825	409,100
Cash flows (used in) provided by investing activities:
Net increase in note receivable - related parties	(207,310)	(127,800)	(175,685)
Net increase (decrease) in income taxes payable - related parties	(10,125)	21,196	(34,347)
Additions to property, plant and equipment	(110,752)	(160,876)	(270,772)
Plant retirements and other	164	7,139	(16,271)
Net cash flows used in investing activities	(328,023)	(260,341)	(497,075)
Cash flows provided by (used in) financing activities:
Increase in book overdraft	1,812	17	(111)
Issuance of long-term debt	0	0	150,000
Repayment of debt	(18,005)	(40,500)	(60,623)
Issuance costs of debt	0	0	1,264
Net cash flows provided by (used in) financing activities	(16,193)	(40,483)	88,002
Change in cash and cash equivalents	(6)	1	27
Cash and cash equivalents at beginning of period	56	55	28
Cash and cash equivalents at end of period	50	56	55
Interest (net of interest rate swap and amounts capitalized)	106,097	102,444	108,861
Income taxes (net of refunds)	$ 35,349	$ 21,684	$ 6,623