Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 03, 2015	Jul. 04, 2015	Apr. 04, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Oct. 03, 2015	Sep. 27, 2014	Sep. 28, 2013
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 209,622	$ 188,502	$ 203,721	$ 200,615	$ 205,344	$ 196,517	$ 199,222	$ 193,556	$ 802,460	$ 794,639	$ 810,126
Gross profit	90,994	78,782	83,304	82,319	80,918	74,261	80,665	77,546	335,399	313,390	322,271
Net Income (Loss) Attributable to Parent	$ 27,302	$ 13,264	$ 18,413	$ 17,430	$ 19,097	$ 12,999	$ 15,307	$ 11,703	$ 76,409	$ 59,106	$ 66,355
Net income (loss)—basic (usd per share)	$ 1.11	$ 0.54	$ 0.75	$ 0.70	$ 0.77	$ 0.52	$ 0.62	$ 0.48	$ 3.09	$ 2.39	$ 2.75
Net income (loss)—diluted (usd per share)	$ 1.10	$ 0.53	$ 0.74	$ 0.69	$ 0.76	$ 0.52	$ 0.61	$ 0.47	$ 3.06	$ 2.36	$ 2.70