Earnings per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2011	Jan. 01, 2011
Earnings Per Share, Basic and Diluted [Abstract]
Weighted average shares outstanding—basic (1)	23,462,000	24,688,000
Dilutive effect of employee awards	499,000	580,000
Weighted average shares outstanding—diluted	23,961,000	25,268,000
Net income	$ 17,051	$ 19,113
Net income per basic share	$ 0.73	$ 0.77
Net income per diluted share	$ 0.71	$ 0.76
Earnings Per Share, Diluted, Other Disclosures [Abstract]
Dilutive securities excluded from calculation of dilutive shares	207,517	52,192