Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 31,884	$ 59,811	$ 22,300
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of debt issuance costs	1,979	70	241
Depreciation and amortization	44,895	19,714	19,966
Equity in undistributed earnings of associated companies, net of dividends	(2,115)	2,784	(2,895)
Acquisition-related fair value adjustments related to inventory	11,714	0	0
Deferred income taxes	(24,242)	8,197	3,754
Uncertain tax positions (non-deferred portion)	958	(89)	(817)
Non-current income taxes payable	856	(8,181)	15,825
Deferred compensation and other, net	(6,789)	2,914	833
Share-based compensation	4,861	3,724	4,190
(Gain) loss on disposal of property, plant and equipment and other assets	(58)	(657)	79
Insurance settlement realized	(822)	(1,055)	(762)
Combination and other acquisition-related expenses, net of payements	(14,414)	2,727	4,952
Restructuring and related charges	26,678	0	0
Pension and other postretirement benefits contributions		(1,392)	(123)
Pension And Other Postretirement Benefit Expense	46
Increase (decrease) in cash from changes in current assets and current liabilities, net of acquisitions:
Accounts receivable	19,926	(2,822)	(1,941)
Inventories	10,844	(10,548)	(6,135)
Prepaid expenses and other current assets	(4,640)	(1,540)	(2,932)
Change in restructuring liabilities	(8,899)	0	(675)
Accounts payable and accrued liabilities	(8,915)	190	12,381
Estimated taxes on income	(1,373)	4,932	(3,479)
Net cash provided by operating activities	82,374	78,779	64,762
Cash flows from investing activities
Investments in property, plant and equipment	(15,545)	(12,886)	(10,872)
Payments related to acquisitions, net of cash acquired	(893,412)	(500)	(5,363)
Proceeds from disposition of assets	103	866	1,577
Insurance settlement interest earned	222	162	50
Net cash used in investing activities	(908,632)	(12,358)	(14,608)
Cash flows from financing activities
Proceeds from long-term debt	750,000	0	0
Borrowings (repayments) on revolving credit facilities, net	147,135	(21,120)	566
Repayments on other debt, net	(8,798)	(5,671)	(3,419)
Financing-related debt issuance costs	(23,747)	0	0
Dividends paid	(21,830)	(19,319)	(18,613)
Stock options exercised, other	1,370	82	(1,956)
Purchase of noncontrolling interest in affiliates, net	0	0	(31,787)
Distributions to noncontrolling affiliate shareholders	0	(877)	0
Net cash provided by (used in) financing activities	844,130	(46,905)	(55,209)
Effect of exchange rate changes on cash	1,258	(6,141)	5,404
Net increase in cash, cash equivalents and restricted cash	19,130	13,375	349
Cash, Cash Equivalents and Restricted Cash at the beginning of the period	124,425	111,050	110,701
Cash, Cash Equivalents and Restricted Cash at the end of the period	143,555	124,425	111,050
Supplemental Cash Flow Information [Abstract]
Income taxes, net of refunds	15,499	19,617	21,544
Interest	19,553	2,417	2,767
Other Noncash Investing And Financing Items [Abstract]
Change in accrued purchases of property, plant and equipment, net	$ 1,978	$ 281
Change in accrued purchases of property, plant and equipment, net			$ (240)