Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Addl. Paid in Capital	Treasury Stock	Accum. Other Comp. Inc. (Loss)	Retained Earnings	Non- controlling Interest
Balance at Dec. 30, 2017	$ 927,556	$ 229	$ 310,012	$ (41,294)	$ (63,668)	$ 722,140	$ 137
Net income	36,029					36,029
Cumulative effect adjustment	0				(9,795)	9,795
Other comprehensive income, net of tax	(279)				(279)
Stock-based compensation	8,714		8,714
Withheld shares on restricted share units for withholding taxes	(2,758)			(2,758)
Stock options exercised	9,609		9,609
Issuance of common stock	472,301	22	472,279
Cash dividends paid	(9,198)					(9,198)
Balance at Mar. 31, 2018	1,441,974	251	800,614	(44,052)	(73,742)	758,766	137
Balance at Dec. 30, 2017	927,556	229	310,012	(41,294)	(63,668)	722,140	137
Net income	78,354
Other comprehensive income, net of tax	(16,221)
Balance at Jun. 30, 2018	1,470,020	253	815,826	(48,336)	(89,684)	791,831	130
Balance at Mar. 31, 2018	1,441,974	251	800,614	(44,052)	(73,742)	758,766	137
Net income	42,326					42,326
Other comprehensive income, net of tax	(15,942)				(15,942)
Stock-based compensation	7,169		7,169
Non-controlling interest	(7)						(7)
Withheld shares on restricted share units for withholding taxes	(4,284)			(4,284)
Stock options exercised	8,045	2	8,043
Cash dividends paid	(9,261)					(9,261)
Balance at Jun. 30, 2018	1,470,020	253	815,826	(48,336)	(89,684)	791,831	130
Balance at Dec. 29, 2018	1,478,342	254	835,828	(116,454)	(97,924)	856,507	131
Net income	36,989					36,989
Other comprehensive income, net of tax	8,073				8,073
Stock-based compensation	3,966		3,966
Withheld shares on restricted share units for withholding taxes	(94)			(94)
Stock options exercised	2,292		2,292
Repurchases of common stock	(13,555)			(13,555)
Cash dividends paid	(10,625)					(10,625)
Balance at Mar. 30, 2019	1,505,388	254	842,086	(130,103)	(89,851)	882,871	131
Balance at Dec. 29, 2018	1,478,342	254	835,828	(116,454)	(97,924)	856,507	131
Net income	80,781
Other comprehensive income, net of tax	2,342
Balance at Jun. 29, 2019	1,509,942	255	855,192	(166,068)	(95,582)	916,014	131
Balance at Mar. 30, 2019	1,505,388	254	842,086	(130,103)	(89,851)	882,871	131
Net income	43,792					43,792
Other comprehensive income, net of tax	(5,731)				(5,731)
Stock-based compensation	8,284		8,284
Withheld shares on restricted share units for withholding taxes	(4,010)			(4,010)
Stock options exercised	4,823	1	4,822
Repurchases of common stock	(31,955)			(31,955)
Cash dividends paid	(10,649)					(10,649)
Balance at Jun. 29, 2019	$ 1,509,942	$ 255	$ 855,192	$ (166,068)	$ (95,582)	$ 916,014	$ 131