Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 280,812	$ 283,920
Accounts receivable, net of allowance for doubtful accounts of $1,382 and $1,094, respectively	457,969	425,936
Inventories, net	387,665	391,580
Prepaid expenses and other assets	60,517	84,723
Income taxes receivable	9,442	6,667
Deferred income taxes	4,763	8,175
Total current assets	1,201,168	1,201,001
Long-term investments	15,729	24,673
Property, plant and equipment, net of accumulated depreciation of $317,354 and $312,983 respectively	168,483	163,660
Goodwill, net	37,912	37,912
Deferred income taxes	36,288	37,420
Other, net	33,377	35,332
Total assets	1,492,957	1,499,998
Current liabilities:
Current installments of capital lease obligations	458	419
Accounts payable	277,042	285,671
Income taxes payable	4,088	5,224
Accrued liabilities	62,400	60,636
Total current liabilities	343,988	351,950
Capital lease obligations, less current installments	10,361	10,600
Other long-term liabilities	22,169	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 - 56,692 and 57,902, respectively; outstanding - 56,581 and 57,791, respectively	5,658	5,779
Additional paid-in capital	662,287	674,498
Retained earnings	462,597	449,193
Accumulated other comprehensive loss	(13,831)	(13,450)
Less treasury shares, at cost; 111 shares	(272)	(272)
Total shareholders' equity	1,116,439	1,115,748
Commitments and contingencies
Total liabilities and shareholders' equity	$ 1,492,957	$ 1,499,998