Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Oct. 03, 2015	Jul. 04, 2015	Apr. 04, 2015	Dec. 27, 2014	Oct. 01, 2016	Oct. 03, 2015	Sep. 27, 2014
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 248,461	$ 218,767	$ 199,882	$ 190,275	$ 209,622	$ 188,502	$ 203,721	$ 200,615	$ 857,385	$ 802,460	$ 794,639
Gross profit	114,336	94,559	88,599	83,898	90,994	78,782	83,304	82,319	381,392	335,399	313,390
Net income	$ 30,785	$ 18,650	$ 17,781	$ 20,286	$ 27,302	$ 13,264	$ 18,413	$ 17,430	$ 87,502	$ 76,409	$ 59,106
Net income (loss)—basic (usd per share)	$ 1.27	$ 0.77	$ 0.74	$ 0.85	$ 1.11	$ 0.54	$ 0.75	$ 0.70	$ 3.62	$ 3.09	$ 2.39
Net income (loss)—diluted (usd per share)	$ 1.25	$ 0.76	$ 0.73	$ 0.84	$ 1.10	$ 0.53	$ 0.74	$ 0.69	$ 3.58	$ 3.06	$ 2.36