Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 325,778	$ 283,920
Accounts receivable, net of allowance for doubtful accounts of $1,424 and $1,094, respectively	455,333	425,936
Inventories, net	375,458	391,580
Prepaid expenses and other assets	33,479	84,723
Income taxes receivable	9,385	6,667
Deferred income taxes	4,152	8,175
Total current assets	1,203,585	1,201,001
Long-term investments	13,999	24,673
Property, plant and equipment, net of accumulated depreciation of $323,881 and $312,983 respectively	174,583	163,660
Goodwill, net	37,912	37,912
Deferred income taxes	33,239	37,420
Other, net	34,024	35,332
Total assets	1,497,342	1,499,998
Current liabilities:
Current installments of capital lease obligations	478	419
Accounts payable	269,823	285,671
Income taxes payable	4,015	5,224
Accrued liabilities	60,286	60,636
Total current liabilities	334,602	351,950
Capital lease obligations, less current installments	10,231	10,600
Other long-term liabilities	20,903	21,700
Shareholders' equity:
Preferred shares, $0.10 par value; 5,000 shares authorized, none issued
Common shares, $0.10 par value; 145,000 shares authorized; issued - 56,219 and 57,902, respectively; outstanding - 56,108 and 57,791, respectively	5,611	5,779
Additional paid-in capital	659,006	674,498
Retained earnings	480,107	449,193
Accumulated other comprehensive loss	(12,846)	(13,450)
Less treasury shares, at cost; 111 shares	(272)	(272)
Total shareholders' equity	1,131,606	1,115,748
Commitments and contingencies
Total liabilities and shareholders' equity	$ 1,497,342	$ 1,499,998