Earnings Per Share (Schedule of Earnings per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net income	$ 14,160	$ 8,438	$ 24,661	$ 41,589
Weighted average common shares outstanding (in shares)	19,251	19,150	19,234	19,137
Effect of dilutive securities
Stock-based compensation (in shares)	190	123	159	121
Weighted average dilutive common shares outstanding (in shares)	19,441	19,273	19,393	19,258
Earnings per share
Basic (in dollars per share)	$ 0.74	$ 0.44	$ 1.28	$ 2.17
Diluted (in dollars per share)	$ 0.73	$ 0.44	$ 1.27	$ 2.16