Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 30,050	$ 36,904
Accounts receivable, net	290,564	313,451
Contract assets	108,114	0
Contract costs, current portion	3,271	0
Inventories	296,622	367,437
Income tax refunds receivable	0	2,889
Other current assets	33,035	27,188
Total current assets	761,656	747,869
Property, plant and equipment, net of accumulated depreciation of $259,827 and $252,611, respectively	186,668	185,452
Goodwill	355,106	351,717
Other intangible assets, net	114,851	117,118
Deferred income taxes	28,819	27,603
Contract costs, noncurrent portion	12,630	0
Other assets	26,031	25,693
Total assets	1,485,761	1,455,452
Current liabilities:
Current portion of long-term debt	7,500	7,500
Accounts payable – trade	139,159	127,591
Accrued salaries and wages	38,710	48,352
Contract liabilities, current portion	5,670	0
Advances on contracts	0	8,527
Income taxes payable	1,257	1,517
Other current liabilities	56,245	52,812
Total current liabilities	248,541	246,299
Long-term debt, excluding current portion, net of debt issuance costs	341,591	391,651
Deferred income taxes	8,213	8,024
Underfunded pension	112,140	126,924
Contract liabilities, noncurrent portion	81,708	0
Other long-term liabilities	51,239	46,898
Commitments and contingencies (Note 13)
Shareholders' equity:
Preferred stock, $1 par value, 200,000 shares authorized; none outstanding	0	0
Common stock, $1 par value, 50,000,000 shares authorized; voting; 29,308,962 and 29,141,467 shares issued, respectively	29,309	29,141
Additional paid-in capital	190,057	185,332
Retained earnings	586,778	587,877
Accumulated other comprehensive income (loss)	(107,583)	(115,814)
Less 1,415,048 and 1,325,975 shares of common stock, respectively, held in treasury, at cost	(56,232)	(50,880)
Total shareholders’ equity	642,329	635,656
Total liabilities and shareholders’ equity	$ 1,485,761	$ 1,455,452