Condensed Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019
Statement of Cash Flows [Abstract]
Net (loss) earnings	$ 185	$ 27,591
Earnings from discontinued operations, net of tax	692	15,380
Earnings from continuing operations	(507)	12,211
Adjustments to reconcile net earnings from continuing operations to net cash (used in) provided by operating activities of continuing operations:
Depreciation and amortization	19,814	12,365
Amortization of debt issuance costs	907	906
Accretion of convertible notes discount	1,412	1,347
Provision for doubtful accounts	314	204
Gain (Loss) on Disposition of Business	(493)	0
Net gain on sale of assets	(13)	(65)
Net loss on derivative instruments	404	3
Stock compensation expense	3,590	3,557
Deferred income taxes	4,124	(3,252)
Changes in assets and liabilities, excluding effects of acquisitions/divestitures:
Accounts receivable	(11,368)	48,270
Increase (Decrease) in Contract with Customer, Asset	(9,158)	(19,572)
Contract costs	(842)	2,355
Inventories	(38,029)	(31,662)
Income tax refunds receivable	(3,382)	(3,656)
Operating Right-of-Use Assets	1,974	2,140
Other assets	135	(892)
Accounts payable - trade	(13,872)	(2,673)
Contract liabilities	(11,002)	(4,640)
Operating Lease Liabilities	(1,916)	(2,115)
Other current liabilities	528	(4,606)
Income taxes payable	(2,658)	(147)
Pension liabilities	(15,775)	2,087
Increase (Decrease) in Other Noncurrent Liabilities	(3,587)	(1,303)
Net Cash Provided by Operating Activities of Continuing Operations	(79,400)	10,862
Net Cash (Used in) Provided by Operating Activities of Discontinued Operations	0	(9,134)
Net cash provided by operating activities	(79,400)	1,728
Cash flows from investing activities:
Proceeds from sale of assets	71	71
Proceeds from Divestiture of Businesses	5,223	0
Proceeds from Sales of Business, Affiliate and Productive Assets	493	0
Expenditures for property, plant & equipment	(9,592)	(11,375)
Payments to Acquire Businesses, Net of Cash Acquired	(304,661)	0
Other, net	(437)	(1,618)
Net Cash Used in Investing Activities of Continuing Operations	(308,903)	(12,922)
Net Cash Used in Investing Activities of Discontinued Operations	0	(3,662)
Net cash used in investing activities	(308,903)	(16,584)
Cash flows from financing activities:
Net borrowings under revolving credit agreements	201,100	16,700
Debt repayment	0	(4,375)
Net change in bank overdraft	131	724
Proceeds from exercise of employee stock awards	1,986	3,546
Purchase of treasury shares	(14,168)	(3,063)
Dividends paid	(11,144)	(11,160)
Other, net	(718)	(663)
Net Cash Provided by Financing Activities of Continuing Operations	177,187	1,709
Net Cash (Used in) Provided by Financing Activities of Discontinued Operations	0	4,458
Net cash provided by (used in) financing activities	177,187	6,167
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(211,116)	(8,689)
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents	0	(1,957)
Effect of exchange rate changes on cash and cash equivalents	314	(49)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	260,738
Cash and cash equivalents and restricted cash at end of period	$ 235,608	$ 17,016