Earnings Per Share - Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 26, 2019	Sep. 26, 2019	Jun. 27, 2019	Mar. 28, 2019	Dec. 27, 2018	Sep. 27, 2018	Jun. 28, 2018	Mar. 29, 2018	Dec. 26, 2019	Dec. 27, 2018	Dec. 28, 2017
Earnings Per Share
Net income	$ 35,341	$ 40,974	$ 43,596	$ 30,720	$ 17,902	$ 26,568	$ 39,846	$ 31,871	$ 150,631	$ 116,187	$ 102,788
Basic weighted average shares outstanding									99,435	96,770	90,951
Dilutive effect of share based awards									5,527	7,791	8,709
Diluted weighted average shares outstanding									104,962	104,561	99,660
Basic earnings per share	$ 0.35	$ 0.41	$ 0.44	$ 0.31	$ 0.18	$ 0.27	$ 0.41	$ 0.33	$ 1.51	$ 1.20	$ 1.13
Diluted earnings per share	$ 0.34	$ 0.39	$ 0.42	$ 0.29	$ 0.17	$ 0.25	$ 0.38	$ 0.30	$ 1.44	$ 1.11	$ 1.03