Consolidated Statements of Shareholders' Equity (Unaudited) - 9 months ended Jul. 02, 2016 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Beginning balance (in shares) at Oct. 03, 2015		14,932
Beginning balance at Oct. 03, 2015	$ 258,142	$ 3,733	$ 4,275	$ 255,711	$ (5,577)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	20,375			21,922	(1,547)
Issuance of common stock, net of issuance cost (in shares)		1,897
Issuance of common stock, net of issuance costs	74,301	$ 474	73,827
Issuance of tangible equity units, net of issuance costs	84,511		84,511
Purchase of capped call transaction	(7,935)		(7,935)
Exercise of stock options (in shares)		67
Exercise of stock options	2,748	$ 17	2,731
Stock-based compensation (in shares)		47
Stock-based compensation	5,244	$ 12	5,232
Tax shortfall from equity compensation	(56)		(56)
Issuance for employee stock purchase plan (in shares)		24
Issuance for employee stock purchase plan	1,048	$ 6	1,042
Common stock purchased and retired (in shares)		(307)
Common stock purchased and retired	(18,396)	$ (77)	(10,577)	(7,742)
Dividends, $0.90 per share	(13,870)			(13,870)
Ending balance (in shares) at Jul. 02, 2016		16,660
Ending balance at Jul. 02, 2016	$ 406,112	$ 4,165	$ 153,050	$ 256,021	$ (7,124)