Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 58,506	$ 79,611
Marketable securities	451	354
Trade accounts receivable, net of allowance for doubtful accounts of $9,248 and $6,728, respectively	414,331	372,159
Inventories	784,068	715,383
Deferred income tax assets	18,248	14,420
Prepaid income taxes	24,869	7,368
Other current assets	107,988	97,361
Total current assets	1,408,461	1,286,656
Property and equipment, less accumulated depreciation	654,850	516,427
Other assets, net	12,473	12,749
Total assets	2,075,784	1,815,832
LIABILITIES AND STOCKHOLDER'S EQUITY
Accounts payable	91,253	78,019
Accrued expenses	148,579	126,155
Total current liabilities	239,832	204,174
Deferred income tax liabilities	63,255	51,298
Commitments and contingencies (notes 5, 9, and 10)
Stockholders' equity:
Preferred stock, 5,000,000 shares authorized	0	0
Common stock, 400,000,000 shares authorized, 296,753,544 and 296,564,382 shares issued and outstanding, respectively	2,968	2,966
Additional paid-in capital	69,847	61,436
Retained earnings	1,688,781	1,477,601
Accumulated other comprehensive income	11,101	18,357
Total stockholders' equity	1,772,697	1,560,360
Total liabilities and stockholders' equity	$ 2,075,784	$ 1,815,832