Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current Assets:
Cash and cash equivalents	$ 106,142	$ 245,219
Accounts receivable, net of allowances for doubtful accounts of $594 and $5,655	549,812	424,014
Inventory	255,095	236,517
Other current assets	73,073	77,752
Total Current Assets	984,122	983,502
Property and Equipment, at cost	1,772,017	1,631,109
Less accumulated depreciation	878,709	844,736
Net Property and Equipment	893,308	786,373
Other Assets:
Goodwill	333,471	143,234
Investments in unconsolidated affiliates	49,607	51,820
Other	140,036	65,577
Total Other Assets	523,114	260,631
Total Assets	2,400,544	2,030,506
Current Liabilities:
Accounts payable	111,381	85,572
Accrued liabilities	335,161	314,410
Income taxes payable	54,833	39,874
Total Current Liabilities	501,375	439,856
Long-term Debt	120,000	0
Other Liabilities, Noncurrent	221,207	200,435
Commitments and Contingencies
Stockholders' Equity:
Common Stock, par value $0.25; 180,000,000 shares authorized; 55,417,044 shares issued	27,709	27,709
Additional paid-in capital	202,619	193,277
Treasury stock; 2,799,118 and 2,603,324 shares, at cost	(71,700)	(61,385)
Retained earnings	1,426,525	1,239,574
Accumulated other comprehensive income	(27,191)	(8,960)
Total Shareholders' Equity	1,557,962	1,390,215
Total Liabilities and Sharesholders' Equity	$ 2,400,544	$ 2,030,506