Net Income Per Share Attributable to Common Stockholders - Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jan. 01, 2022	Jan. 02, 2021
Numerator:
Net income	$ 123,481	$ 132,292
Denominator:
Weighted-average shares of common stock - basic (in shares)	127,662,826	115,610,523
Weighted-average shares of common stock - diluted (in shares)	142,322,448	130,644,147
Net income attributable to common stockholders:
Net income per share attributable to common stockholders - basic (in USD per share)	$ 0.97	$ 1.14
Net income per share attributable to common stockholders - diluted (in USD per share)	$ 0.87	$ 1.01
Stock Options
Denominator:
Effect of potentially dilutive stock options, RSUs, and PSUs (in shares)	8,162,237	8,105,916
Restricted stock units
Denominator:
Effect of potentially dilutive stock options, RSUs, and PSUs (in shares)	6,306,547	6,927,708
Performance Share Units
Denominator:
Effect of potentially dilutive stock options, RSUs, and PSUs (in shares)	190,838	0