Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Beginning Balance at Jan. 02, 2021	$ 485,134	$ 625	$ 420,202	$ 2,720	$ 79,896	$ (18,309)
Beginning Balance, Shares at Jan. 02, 2021		58,998,711
Vesting of restricted stock, Shares		189,466
Issuance of treasury stock, Shares		4,600
Issuance of treasury stock					(20)	20
Grants of restricted stock		$ 3	(3)
Forfeitures of restricted stock		$ (1)	1
Purchases of treasury stock	(1,005)					(1,005)
Purchases of treasury stock, Shares		(42,414)
Retirement of treasury stock			(844)		(161)	1,005
Stock-based compensation	3,494		3,494
Exercise of stock options, Shares		67,797
Exercise of stock options	138	$ 1	137
Common stock issued under ESPP, Shares		11,171
Common stock issued under ESPP	177		177
Issuance in acquisition of Eco	6,108	$ 4	6,104
Issuance in acquisition of Eco, Shares		357,797
Net income attributable to the Company	22,529				22,529
Decrease (increase) in value of RNCI	(3,563)				(3,563)
Other comprehensive income (loss), net of tax expense	8,610			8,610
Ending Balance at Jul. 03, 2021	521,622	$ 632	429,268	11,330	98,681	(18,289)
Ending Balance, Shares at Jul. 03, 2021		59,587,128
Beginning Balance at Apr. 03, 2021	509,266	$ 631	427,210	7,615	92,119	(18,309)
Beginning Balance, Shares at Apr. 03, 2021		59,461,200
Vesting of restricted stock, Shares		42,360
Issuance of treasury stock, Shares		4,600
Issuance of treasury stock					(20)	20
Stock-based compensation	1,744		1,744
Exercise of stock options, Shares		67,797
Exercise of stock options	138	$ 1	137
Common stock issued under ESPP, Shares		11,171
Common stock issued under ESPP	177		177
Net income attributable to the Company	10,145				10,145
Decrease (increase) in value of RNCI	(3,563)				(3,563)
Other comprehensive income (loss), net of tax expense	3,715			3,715
Ending Balance at Jul. 03, 2021	521,622	$ 632	429,268	11,330	98,681	(18,289)
Ending Balance, Shares at Jul. 03, 2021		59,587,128
Beginning Balance at Jan. 01, 2022	529,097	$ 635	433,347	7,006	106,398	(18,289)
Beginning Balance, Shares at Jan. 01, 2022		59,696,117
Vesting of restricted stock, Shares		317,102
Grants of restricted stock		$ 6	(6)
Forfeitures of restricted stock		$ (1)	1
Purchases of treasury stock	(1,663)					(1,663)
Purchases of treasury stock, Shares		(84,492)
Retirement of treasury stock		$ (1)	(1,335)		(327)	1,663
Stock-based compensation	4,909		4,909
Common stock issued under ESPP, Shares		17,964
Common stock issued under ESPP	291		291
Net income attributable to the Company	59,330				59,330
Decrease (increase) in value of RNCI	(1,785)				(1,785)
Other comprehensive income (loss), net of tax expense	(9,374)			(9,374)
Ending Balance at Jul. 02, 2022	580,805	$ 639	437,207	(2,368)	163,616	(18,289)
Ending Balance, Shares at Jul. 02, 2022		59,946,691
Beginning Balance at Apr. 02, 2022	553,655	$ 639	434,212	9,989	127,104	(18,289)
Beginning Balance, Shares at Apr. 02, 2022		59,900,587
Vesting of restricted stock, Shares		28,140
Grants of restricted stock		$ 1	(1)
Forfeitures of restricted stock		$ (1)	1
Stock-based compensation	2,704		2,704
Common stock issued under ESPP, Shares		17,964
Common stock issued under ESPP	291		291
Net income attributable to the Company	36,161				36,161
Decrease (increase) in value of RNCI	351				351
Other comprehensive income (loss), net of tax expense	(12,357)			(12,357)
Ending Balance at Jul. 02, 2022	$ 580,805	$ 639	$ 437,207	$ (2,368)	$ 163,616	$ (18,289)
Ending Balance, Shares at Jul. 02, 2022		59,946,691