Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Assets
Cash and cash equivalents	$ 394,194	$ 345,555
Accounts receivable, net of allowance for doubtful accounts of $369 and $338, respectively	464,999	559,763
Inventories, net	443,203	396,699
Prepaid expenses and other assets	28,160	26,283
Income taxes receivable	2,803	3,231
Deferred income taxes	9,259	11,302
Total current assets	1,342,618	1,342,833
Long-term investments	9,906	9,921
Property, plant and equipment, net of accumulated depreciation of $352,843 and $346,500 respectively	187,689	185,319
Goodwill, net	45,970	44,691
Deferred income taxes	33,071	33,856
Other, net	38,637	40,751
Total assets	1,657,891	1,657,371
Current liabilities:
Current installments of capital lease obligations	605	582
Accounts payable	299,715	320,953
Income taxes payable	8,215	9,570
Accrued liabilities	67,646	67,272
Total current liabilities	376,181	398,377
Capital lease obligations, less current installments	9,366	9,521
Other long-term liabilities	21,599	20,369
Deferred income taxes	2,071	2,071
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 - 54,117 and 53,936, respectively; outstanding - 54,006 and 53,825, respectively	5,401	5,383
Additional paid-in capital	649,536	644,594
Retained earnings	603,147	586,422
Accumulated other comprehensive loss	(9,138)	(9,094)
Less treasury shares, at cost; 111 shares	(272)	(272)
Total shareholders' equity	1,248,674	1,227,033
Commitments and contingencies
Total liabilities and shareholders' equity	$ 1,657,891	$ 1,657,371