Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 119,310	$ 120,549
Accounts receivable, net of allowances for doubtful accounts	672,055	666,930
Inventory	394,874	331,280
Other current assets	105,501	84,231
Total Current Assets	1,291,740	1,202,990
Property and Equipment, at cost	2,158,500	2,069,119
Less accumulated depreciation	1,092,758	1,043,987
Net Property and Equipment	1,065,742	1,025,132
Other Assets:
Goodwill	331,577	363,193
Investments in unconsolidated affiliates	39,501	42,619
Other non-current assets	134,280	134,184
Total Other Assets	505,358	539,996
Total Assets	2,862,840	2,768,118
Current Liabilities:
Accounts payable	140,378	130,489
Accrued liabilities	406,895	408,303
Income taxes payable	55,247	78,393
Total Current Liabilities	602,520	617,185
Long-term Debt	75,000	94,000
Other Long-term Liabilities	310,783	241,473
Commitments and Contingencies
Stockholders' Equity:
Common Stock	27,709	27,709
Additional paid-in capital	211,502	212,940
Treasury stock, at cost	(75,736)	(84,062)
Retained earnings	1,771,409	1,641,027
Accumulated other comprehensive income	(60,347)	17,846
Total Shareholders' Equity	1,874,537	1,815,460
Total Liabilities and Sharesholders' Equity	$ 2,862,840	$ 2,768,118