Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 198,878	$ 117,676
Marketable securities	27,194	27,165
Trade accounts receivable, net of allowance for doubtful accounts of $5,814 and $5,647, respectively	386,882	338,594
Inventories	647,886	646,152
Deferred income tax assets	14,838	16,718
Other current assets	74,297	89,833
Total current assets	1,349,975	1,236,138
Property and equipment, less accumulated depreciation	450,239	435,601
Other assets, net	13,118	13,209
Total assets	1,813,332	1,684,948
Liabilities and Stockholders' Equity
Accounts payable	76,113	73,779
Accrued expenses	113,096	111,962
Income taxes payable	47,018	2,077
Total current liabilities	236,227	187,818
Deferred income tax liabilities	38,137	38,154
Stockholders' equity:
Preferred stock, 5,000,000 shares authorized	0	0
Common stock, 400,000,000 shares authorized, 296,071,374 and 295,258,674 shares issued and outstanding, respectively	2,961	2,953
Additional paid-in capital	43,880	16,856
Retained earnings	1,474,368	1,424,371
Accumulated other comprehensive income	17,759	14,796
Total stockholders' equity	1,538,968	1,458,976
Total liabilities and stockholders' equity	$ 1,813,332	$ 1,684,948