Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock at Cost	Accumulated Other Comprehensive (Loss) Income	Non-controlling Interests
Beginning Balance (in shares) at Dec. 30, 2017		67,740,380			25,749,493
Beginning Balance at Dec. 30, 2017	$ 653,877	$ 677	$ 209,599	$ 1,611,158	$ (1,167,600)	$ (3,162)	$ 3,205
Net income (loss)	57,473			57,517			(44)
Dividends	(6,308)			(6,308)
Purchases of common stock (in shares)					14,354
Purchases of common stock	(1,508)				$ (1,508)
Issuance of stock related to stock-based compensation plans (in shares)		95,784			4,822
Issuance of stock related to stock-based compensation plans	(1,725)	$ 1	(1,376)		$ (350)
Stock-based compensation	3,710		3,710
Other comprehensive (loss) income	(12)					(389)	377
Ending Balance (in shares) at Mar. 31, 2018		67,836,164			25,768,669
Ending Balance at Mar. 31, 2018	706,280	$ 678	211,933	1,663,140	$ (1,169,458)	(3,551)	3,538
Beginning Balance (in shares) at Dec. 30, 2017		67,740,380			25,749,493
Beginning Balance at Dec. 30, 2017	653,877	$ 677	209,599	1,611,158	$ (1,167,600)	(3,162)	3,205
Net income (loss)	119,965
Ending Balance (in shares) at Jun. 30, 2018		67,847,692			26,754,810
Ending Balance at Jun. 30, 2018	660,933	$ 678	216,328	1,719,475	$ (1,273,489)	(5,284)	3,225
Adoption of accounting standards	773			773
Beginning Balance (in shares) at Mar. 31, 2018		67,836,164			25,768,669
Beginning Balance at Mar. 31, 2018	706,280	$ 678	211,933	1,663,140	$ (1,169,458)	(3,551)	3,538
Net income (loss)	62,492			62,523			(31)
Dividends	(6,188)			(6,188)
Purchases of common stock (in shares)					985,646
Purchases of common stock	(103,980)				$ (103,980)
Issuance of stock related to stock-based compensation plans (in shares)		11,528			495
Issuance of stock related to stock-based compensation plans	(48)		3		$ (51)
Stock-based compensation	4,392		4,392
Other comprehensive (loss) income	(2,015)					(1,733)	(282)
Ending Balance (in shares) at Jun. 30, 2018		67,847,692			26,754,810
Ending Balance at Jun. 30, 2018	660,933	$ 678	216,328	1,719,475	$ (1,273,489)	(5,284)	3,225
Beginning Balance (in shares) at Dec. 29, 2018		67,870,962			27,755,001
Beginning Balance at Dec. 29, 2018	689,133	$ 679	226,852	1,841,279	$ (1,376,111)	(5,875)	2,309
Net income (loss)	63,300			63,317			(17)
Dividends	(6,629)			(6,629)
Purchases of common stock (in shares)					124,481
Purchases of common stock	(12,977)				$ (12,977)
Purchase of noncontrolling interests	(600)		1,842				(2,442)
Issuance of stock related to stock-based compensation plans (in shares)		176,079			5,199
Issuance of stock related to stock-based compensation plans	(7,604)	$ 1	(7,081)		$ (524)
Stock-based compensation	1,938		1,938
Other comprehensive (loss) income	1,699					1,549	150
Ending Balance (in shares) at Mar. 30, 2019		68,047,041			27,884,681
Ending Balance at Mar. 30, 2019	728,260	$ 680	223,551	1,897,967	$ (1,389,612)	(4,326)
Beginning Balance (in shares) at Dec. 29, 2018		67,870,962			27,755,001
Beginning Balance at Dec. 29, 2018	689,133	$ 679	226,852	1,841,279	$ (1,376,111)	(5,875)	2,309
Net income (loss)	124,400
Ending Balance (in shares) at Jun. 29, 2019		68,064,877			28,435,182
Ending Balance at Jun. 29, 2019	728,300	$ 681	224,550	1,952,439	$ (1,446,425)	(2,945)	0
Beginning Balance (in shares) at Mar. 30, 2019		68,047,041			27,884,681
Beginning Balance at Mar. 30, 2019	728,260	$ 680	223,551	1,897,967	$ (1,389,612)	(4,326)
Net income (loss)	61,100			61,100
Dividends	(6,628)			(6,628)
Purchases of common stock (in shares)					549,929
Purchases of common stock	(56,752)				$ (56,752)
Issuance of stock related to stock-based compensation plans (in shares)		17,836			572
Issuance of stock related to stock-based compensation plans	(491)	$ 1	(431)		$ (61)
Stock-based compensation	1,430		1,430
Other comprehensive (loss) income	1,381					1,381
Ending Balance (in shares) at Jun. 29, 2019		68,064,877			28,435,182
Ending Balance at Jun. 29, 2019	$ 728,300	$ 681	$ 224,550	$ 1,952,439	$ (1,446,425)	$ (2,945)	$ 0