Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 302,036	$ 241,316
Accounts receivable, net	191,985	188,423
Contract assets, net	112,546	139,289
Inventories	117,882	110,478
Income taxes prepaid and receivable	1,958	5,940
Prepaid expenses and other current assets	32,394	31,830
Total current assets	758,801	717,276
Property, plant and equipment, net	436,417	448,554
Intangibles, net	39,081	46,869
Goodwill	182,124	187,553
Deferred income taxes	26,376	38,757
Noncurrent receivables, net	31,849	36,265
Other assets	81,416	74,662
Total assets	1,556,064	1,549,936
Current liabilities:
Accounts payable	68,954	49,173
Accrued liabilities	124,325	125,459
Current maturities of long-term debt	0	9
Income taxes payable	14,887	16,222
Total current liabilities	208,166	190,863
Long-term debt	350,000	398,000
Other noncurrent liabilities	107,794	130,424
Deferred taxes and other liabilities	12,499	10,784
Total liabilities	678,459	730,071
Commitments and Contingencies
Shareholders’ Equity
Preferred stock, par value $5.00 per share; authorized 2,000,000 shares; none issued	0	0
Additional paid-in capital	436,996	433,696
Retained earnings	863,057	770,746
Accumulated items of other comprehensive income:
Translation adjustments	(105,880)	(83,203)
Pension and postretirement liability adjustments	(38,490)	(39,661)
Derivative valuation adjustment	(1,614)	(9,544)
Treasury stock (Class A), at cost; 8,665,090 shares in 2021 and 8,391,011 shares in 2020	(280,143)	(256,009)
Total Company shareholders’ equity	873,967	816,066
Noncontrolling interest	3,638	3,799
Total equity	877,605	819,865
Total liabilities and shareholders’ equity	1,556,064	1,549,936
Common Class A
Shareholders’ Equity
Common stock, par value	41	39
Common Class B
Shareholders’ Equity
Common stock, par value	$ 0	$ 2