Consolidated Balance Sheets - USD ($)	Mar. 31, 2023	Dec. 31, 2022
ASSETS
Cash and cash equivalents	$ 304,258,000	$ 291,776,000
Accounts receivable, net	216,035,000	200,018,000
Contract assets, net	153,817,000	148,695,000
Inventories	153,777,000	139,050,000
Income taxes prepaid and receivable	8,711,000	7,938,000
Prepaid expenses and other current assets	52,857,000	50,962,000
Total current assets	889,455,000	838,439,000
Property, plant and equipment, net	450,254,000	445,658,000
Intangibles, net	32,874,000	33,811,000
Goodwill	179,255,000	178,217,000
Deferred income taxes	15,843,000	15,196,000
Noncurrent receivables, net	27,322,000	27,913,000
Other assets	100,755,000	103,021,000
Total assets	1,695,758,000	1,642,255,000
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	76,241,000	69,707,000
Accrued liabilities	103,986,000	126,385,000
Current maturities of long-term debt	0	0
Income taxes payable	4,464,000	15,224,000
Total current liabilities	184,691,000	211,316,000
Long-term debt	491,000,000	439,000,000
Other noncurrent liabilities	108,371,000	108,758,000
Deferred taxes and other liabilities	14,181,000	15,638,000
Total liabilities	798,243,000	774,712,000
SHAREHOLDERS' EQUITY
Preferred stock	0	0
Additional paid in capital	441,917,000	441,540,000
Retained earnings	950,415,000	931,318,000
Accumulated items of other comprehensive income:
Translation adjustments	(132,970,000)	(146,851,000)
Pension and postretirement liability adjustments	(16,699,000)	(15,783,000)
Derivative valuation adjustment	14,805,000	17,707,000
Treasury stock (Class A), at cost; 9,674,542 shares in 2023 and 9,674,542 in 2022	(364,923,000)	(364,923,000)
Total Company shareholders' equity	892,586,000	863,049,000
Noncontrolling interest	4,929,000	4,494,000
Total equity	897,515,000	867,543,000
Total liabilities and shareholders' equity	1,695,758,000	1,642,255,000
Common Class A
SHAREHOLDERS' EQUITY
Common stock	41,000	41,000
Common Class B
SHAREHOLDERS' EQUITY
Common stock	$ 0	$ 0