Annual report pursuant to Section 13 and 15(d)

Earnings Per Share - Numerators and Denominators in Basic and Diluted Earnings (Loss) Per Share (Detail)

v3.8.0.1
Earnings Per Share - Numerators and Denominators in Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2017
Jun. 24, 2017
Mar. 25, 2017
Dec. 24, 2016
Sep. 24, 2016
Jun. 25, 2016
Mar. 26, 2016
Dec. 26, 2015
Sep. 30, 2017
Sep. 24, 2016
Sep. 26, 2015
Earnings Per Share [Abstract]                      
Net income (loss) available to common shareholders basic                 $ 78,828 $ 44,514 $ 31,971
Net income (loss) available to common shareholders diluted                 $ 78,828 $ 44,514 $ 31,971
Net income (loss) available to common shareholders basic (in shares) 50,654 50,507 50,079 49,665 49,453 49,120 48,717 48,566 50,230 48,964 48,562
Options to purchase common stock (in shares)                 992 1,335 520
Restricted shares (in shares)                 598 776 556
Net income (loss) available to common shareholders diluted (in shares) 51,935 51,825 51,983 51,810 49,453 51,063 50,445 48,566 51,820 51,075 49,638
Net income (loss) available to common shareholders basic (in usd per share) $ 0.08 $ 0.64 $ 0.69 $ 0.15 $ (0.11) $ 0.53 $ 0.67 $ (0.18) $ 1.57 $ 0.91 $ 0.66
Options to purchase common stock (in usd per share)                 (0.03) (0.02) (0.01)
Restricted shares (in usd per share)                 (0.02) (0.02) (0.01)
Net income (loss) available to common shareholders diluted (in usd per share) $ 0.08 $ 0.62 $ 0.67 $ 0.15 $ (0.11) $ 0.51 $ 0.65 $ (0.18) $ 1.52 $ 0.87 $ 0.64