Condensed Consolidated Statements Of Operations And Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Apr. 02, 2011	Mar. 31, 2012	Apr. 02, 2011
Condensed Consolidated Statements Of Operations And Comprehensive Income [Abstract]
Net sales	$ 573,470	$ 568,145	$ 1,103,124	$ 1,133,919
Cost of sales	518,846	512,675	996,848	1,023,539
Gross profit	54,624	55,470	106,276	110,380
Selling and administrative expenses	28,856	29,060	56,746	56,121
Operating income	25,768	26,410	49,530	54,259
Other income (expense):
Interest expense	(4,020)	(2,082)	(8,080)	(4,263)
Interest income	415	273	898	566
Miscellaneous	228	(16)	(317)	(157)
Income before income taxes	22,391	24,585	42,031	50,405
Income tax expense	2,433	725	4,203	1,512
Net income	19,958	23,860	37,828	48,893
Earnings per share:
Basic	$ 0.57	$ 0.60	$ 1.09	$ 1.22
Diluted	$ 0.56	$ 0.59	$ 1.07	$ 1.19
Weighted average shares outstanding:
Basic	34,874	39,927	34,737	40,197
Diluted	35,658	40,659	35,431	40,934
Comprehensive income:
Net income	19,958	23,860	37,828	48,893
Derivative instrument fair market value adjustment - net of income tax	2,065	2,259	3,659	2,447
Foreign currency translation adjustments	342	1,552	1,177	2,370
Comprehensive income	$ 22,365	$ 27,671	$ 42,664	$ 53,710