Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Dec. 25, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 75,085	$ 10,051	$ (10,732)
Other comprehensive income (loss):
Change in cumulative translation adjustment	1,193	(393)	(5)
Cash flow hedges:
Change in fair value of derivatives	1,274	(60)	23
Adjustment for net gain (loss) realized and included in net income	(237)	88	(36)
Total change in unrealized gain (loss) on derivative instruments	1,037	28	(13)
Other comprehensive income (loss)	2,230	(365)	(18)
Comprehensive income (loss)	$ 77,315	$ 9,686	$ (10,750)