Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 03, 2022	Dec. 28, 2020	Dec. 30, 2019
Cash flows from operating activities:
Net income	$ 54,414	$ 177,535	$ 41,301
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property, plant and equipment	85,942	120,947	166,574
Amortization of definite-lived intangible assets	41,389	45,182	53,296
Amortization of debt discount and issuance costs	2,110	17,451	14,265
Loss on extinguishment of debt	15,217
Deferred income taxes	9,745	6,653	(12,454)
Stock-based compensation	17,711	16,073	16,816
Impairment of goodwill		69,200
Gain on sale of the Mobility business unit		(237,253)
Other	(9,650)	1,968	(2,142)
Changes in operating assets and liabilities:
Accounts receivable, net	(5,242)	122,547	19,501
Contract assets	(51,606)	(25,093)	(494)
Inventories	(11,961)	1,380	(12,642)
Prepaid expenses and other current assets	(5,023)	(3,452)	1,802
Accounts payable	40,951	1,210	42,045
Contract liabilities	9,935	416	618
Accrued salaries, wages and benefits	(7,822)	7,940	3,770
Other liabilities	(9,478)	(35,528)	(20,319)
Net cash provided by operating activities	176,632	287,176	311,937
Cash flows from investing activities:
Proceeds from sale of the Mobility business unit, net of cash disposed		507,466
Purchase of property, plant and equipment and other assets	(81,951)	(103,289)	(142,576)
Proceeds from sale of property, plant and equipment and other assets	1,427	738	6,604
Investment in unconsolidated joint venture	(3,188)
Other	(431)	(623)
Net cash (used in) provided by investing activities	(84,143)	404,292	(135,972)
Cash flows from financing activities:
Proceeds from long-term debt borrowing	500,000
Repayment of long-term debt borrowings	(425,838)	(649,975)	(30,000)
Payment of debt issuance costs	(5,960)		(1,803)
Proceeds from exercise of stock options		191
Repurchases of common stock	(64,726)
Cash used to settle warrants	(3,231)
Redemption of convertible notes			(10)
Other	(7,477)	7,478
Net cash used in financing activities	(7,232)	(642,306)	(31,813)
Effect of foreign currency exchange rates on cash and cash equivalents	856	2,249	(358)
Net increase in cash and cash equivalents	86,113	51,411	143,794
Cash and cash equivalents at beginning of year	451,565	400,154	256,360
Cash and cash equivalents at end of year	537,678	451,565	400,154
Cash and cash equivalents in assets held for sale			(20,336)
Cash and cash equivalents as presented on the consolidated balance sheet	537,678	451,565	379,818
Supplemental cash flow information:
Cash paid, net for interest	42,364	59,209	71,267
Cash paid, net for income taxes	5,211	18,081	20,120
Net cash provided by operating activities from discontinued operations		39,462	16,123
Net cash provided by (used in) investing activities from discontinued operations		497,916	(24,155)
Supplemental disclosure of noncash investing and financing activities:
Property, plant and equipment recorded in accounts payable	33,323	$ 29,002	58,606
Issuance of common stock for warrant settlement	$ 2,268
Supplemental disclosure of noncash investing activities from discontinued operations:
Property, plant and equipment recorded in accounts payable			$ 8,918