Condensed Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net earnings	$ 14,066	$ 6,291
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	10,661	10,756
Amortization of debt issuance costs	449	388
Accretion of convertible notes discount	637	553
Provision for doubtful accounts	295	263
Net gain on sale of assets	(63)	(20)
Net gain on derivative instruments	(391)	(67)
Stock compensation expense	1,455	1,381
Deferred income taxes	2,232	2,731
Changes in assets and liabilities, excluding effects of acquisitions/divestitures:
Accounts receivable	(6,014)	(26,266)
Contract assets	(25,130)	0
Contract costs	(4,990)	0
Inventories	(1,947)	4,157
Income tax refunds receivable	2,893	309
Other current assets	(5,615)	(804)
Accounts payable - trade	10,187	(4,655)
Contract liabilities	75,986	0
Advances on contracts	0	(1,952)
Other current liabilities	(8,209)	(2,428)
Income taxes payable	(1,817)	690
Pension liabilities	(11,938)	(10,534)
Other long-term liabilities	4,166	758
Net cash provided by (used in) operating activities	56,913	(18,449)
Cash flows from investing activities:
Proceeds from sale of assets	103	227
Expenditures for property, plant & equipment	(6,422)	(7,409)
Other, net	(293)	(1,072)
Net cash used in investing activities	(6,612)	(8,254)
Cash flows from financing activities:
Net (repayments) borrowings under revolving credit agreements	(50,708)	14,860
Debt repayment	(1,875)	(1,250)
Net change in bank overdraft	2,598	2,381
Proceeds from exercise of employee stock awards	2,687	1,653
Purchase of treasury shares	(4,600)	(2,689)
Dividends paid	(5,569)	(4,881)
Other	(271)	(120)
Net cash (used in) provided by financing activities	(57,738)	9,954
Net (decrease) increase in cash and cash equivalents	(7,437)	(16,749)
Effect of exchange rate changes on cash and cash equivalents	583	228
Cash and cash equivalents at beginning of period	36,904	41,205
Cash and cash equivalents at end of period	30,050	24,684
Supplemental disclosure of noncash activities:
Common shares issued for partial unwind of warrant transactions	$ 2,281	$ 0