Consolidated Statements of Total Equity - USD ($) $ in Thousands	Total	Stockholders' Equity	Common Stock	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interest
Balance at Beginning of Year at Dec. 29, 2013	$ 465,808	$ 465,808	$ 133,203	$ 333,601	$ (996)
Balance at Beginning of Year (in Shares) at Dec. 29, 2013			18,803,663
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings including noncontrolling interest	94,055	94,094		94,094		$ (39)
Other comprehensive loss	(1,100)	(1,100)			(1,100)
Shares issued under employee stock purchase plan	2,081	2,081	$ 2,081
Shares issued under employee stock purchase plan (in Shares)			17,040
Shares issued from restricted stock units (in Shares)			144,001
Units effectively repurchased for required employee withholding taxes	(4,874)	(4,874)	$ (4,874)
Units effectively repurchased for required employee withholding taxes (in Shares)			(55,538)
Exercise of stock options	951	951	$ 951
Exercise of stock options (in Shares)			27,965
Excess tax benefit from stock issued	2,500	2,500	$ 2,500
Stock-based compensation	14,253	14,253	14,253
Noncontrolling interest resulting from acquisition	625					625
Balance at End of Year at Dec. 28, 2014	574,299	573,713	$ 148,114	427,695	(2,096)	586
Balance at End of Year (in Shares) at Dec. 28, 2014			18,937,131
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings including noncontrolling interest	94,876	95,069		95,069		(193)
Other comprehensive loss	(1,998)	(1,998)			(1,998)
Shares issued under employee stock purchase plan	2,390	2,390	$ 2,390
Shares issued under employee stock purchase plan (in Shares)			18,510
Shares issued from restricted stock units (in Shares)			103,112
Units effectively repurchased for required employee withholding taxes	(10,860)	(10,860)	$ (10,860)
Units effectively repurchased for required employee withholding taxes (in Shares)			(41,610)
Exercise of stock options	2,964	2,964	$ 2,964
Exercise of stock options (in Shares)			56,256
Excess tax benefit from stock issued	5,455	5,455	$ 5,455
Stock-based compensation	13,611	13,611	13,611
Repurchase of common stock	(25,000)	(25,000)	$ (1,321)	(23,679)		0
Repurchase of Common Stock (in Shares)			(155,623)
Balance at End of Year at Dec. 27, 2015	655,737	655,344	$ 160,353	499,085	(4,094)	393
Balance at End of Year (in Shares) at Dec. 27, 2015			18,917,776
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings including noncontrolling interest	94,213	94,745		94,745		(532)
Other comprehensive loss	216	216			216
Shares issued under employee stock purchase plan	2,797	2,797	$ 2,797
Shares issued under employee stock purchase plan (in Shares)			24,619
Shares issued from restricted stock units (in Shares)			143,438
Units effectively repurchased for required employee withholding taxes	(4,382)	(4,382)	$ (4,382)
Units effectively repurchased for required employee withholding taxes (in Shares)			(58,868)
Exercise of stock options	$ 1,412	1,412	$ 1,412
Exercise of stock options (in Shares)	22,033		22,033
Excess tax benefit from stock issued	$ 204	204	$ 204
Stock-based compensation	399	399	399
Repurchase of common stock	(232,696)	(232,696)	$ (13,549)	(219,147)		0
Repurchase of Common Stock (in Shares)			(1,586,533)
Balance at End of Year at Dec. 25, 2016	$ 517,900	$ 518,039	$ 147,234	$ 374,683	$ (3,878)	$ (139)
Balance at End of Year (in Shares) at Dec. 25, 2016			17,462,465