Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities
Net income	$ 39,787	$ 31,884	$ 59,811
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of debt issuance costs	4,749	1,979	70
Depreciation and amortization	83,246	44,895	19,714
Equity in undistributed earnings of associated companies, net of dividends	4,862	(2,115)	2,784
Acquisition-related fair value adjustments related to inventory	229	11,714	0
Deferred income taxes	(38,281)	(24,242)	8,197
Uncertain tax positions (non-deferred portion)	1,075	958	(89)
Non-current income taxes payable	0	856	(8,181)
Deferred compensation and other, net	(471)	(6,789)	2,914
Share-based compensation	10,996	4,861	3,724
Loss (gain) on disposal of property, plant and equipment and other assets	871	(58)	(657)
Insurance settlement realized	(1,035)	(822)	(1,055)
Indefinite-lived intangible asset impairment	38,000	0	0
Gain on inactive subsidiary litigation and settlement reserve	(18,144)	0	0
Combination and other acquisition-related expenses, net of payements	860	(14,414)	2,727
Restructuring and related charges	5,541	26,678	0
Pension and other postretirement benefits contributions	(16,535)	(46)	(1,392)
Increase (decrease) in cash from changes in current assets and current liabilities, net of acquisitions:
Accounts receivable	17,170	19,926	(2,822)
Inventories	(3,854)	10,844	(10,548)
Prepaid expenses and other current assets	927	(4,640)	(1,540)
Change in restructuring liabilities	(15,745)	(8,899)	0
Accounts payable and accrued liabilities	22,308	(8,915)	190
Estimated taxes on income	8,763	(1,373)	4,932
Net cash provided by operating activities	178,389	82,374	78,779
Cash flows from investing activities
Investments in property, plant and equipment	(17,901)	(15,545)	(12,886)
Payments related to acquisitions, net of cash acquired	(56,230)	(893,412)	(500)
Proceeds from disposition of assets	2,702	103	866
Insurance settlement interest earned	44	222	162
Net cash used in investing activities	(71,385)	(908,632)	(12,358)
Cash flows from financing activities
Payments of long-term debt	37,615	0	0
Proceeds from long-term debt	0	750,000	0
(Repayments) borrowings on revolving credit facilities, net	(11,485)	147,135	(21,120)
Repayments on other debt, net	(661)	(8,798)	(5,671)
Financing-related debt issuance costs	0	(23,747)	0
Dividends paid	(27,563)	(21,830)	(19,319)
Stock options exercised, other	3,867	1,370	82
Purchase of noncontrolling interest in affiliates, net	(1,047)	0	0
Distributions to noncontrolling affiliate shareholders	(751)	0	(877)
Net cash provided (used in) by financing activities	(75,255)	844,130	(46,905)
Effect of exchange rate changes on cash	6,591	1,258	(6,141)
Net increase in cash, cash equivalents and restricted cash	38,340	19,130	13,375
Cash, Cash Equivalents and Restricted Cash at the beginning of the period	143,555	124,425	111,050
Cash, Cash Equivalents and Restricted Cash at the end of the period	181,895	143,555	124,425
Supplemental Cash Flow Information [Abstract]
Income taxes, net of refunds	20,253	15,499	19,617
Interest	23,653	19,553	2,417
Other Noncash Investing And Financing Items [Abstract]
Change in accrued purchases of property, plant and equipment, net	$ 1,376	$ 1,978	$ 281