Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 80,833	$ 95,852
Trade receivables, net	84,649	146,330
Contract assets	100,786	33,490
Other receivables	16,961	5,198
Inventories, net	114,717	111,062
Prepaid expenses and other current assets	8,003	18,160
Total current assets	405,949	410,092
Property, plant and equipment, net	392,565	360,528
Right of use assets	35,615
Goodwill	406,139	261,095
Intangible assets, net	247,699	187,205
Other non-current assets	7,108	3,099
Deferred income taxes	11,485	1,409
Total assets	1,506,560	1,223,428
Current liabilities:
Accounts payable	43,317	47,012
Contract liabilities, current	57,577	11,713
Taxes payable	5,380	1,651
Operating lease liabilities, current	3,014
Current portion of long-term debt	10,000
Accrued expenses and other current liabilities	51,822	44,036
Total current liabilities	171,110	104,412
Contract liabilities, non-current	4,653	42,701
Long-term debt	482,500	300,000
Deferred income taxes	76,884	57,276
Operating lease liabilities, non-current	33,099
Accrued pension benefits	39,725	42,218
Other non-current liabilities	22,699	23,094
Total liabilities	830,670	569,701
Stockholders' equity:
Common stock, $.10 par value; authorized 100,000,000, issued 34,988,476 and 34,870,124 shares at respective dates	3,499	3,487
Additional paid-in capital	189,392	182,691
Retained earnings	574,036	538,463
Treasury stock, at cost, 1,264,109 and 1,264,109 shares at respective dates	(10,777)	(10,777)
Accumulated other comprehensive loss	(80,260)	(60,137)
Total stockholders' equity	675,890	653,727
Total liabilities and stockholders' equity	$ 1,506,560	$ 1,223,428