Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash Flows from Operating Activities:
Net Income	$ 147,468	$ 97,403	$ 25,941
Excluding the effects of acquisitions, increase (decrease) in cash from:
Cost, Depreciation and Amortization	103,443	104,960	120,969
Accounts receivable	(8,000)	(83,075)	(50,732)
Inventory	(13,092)	(25,423)	(30,692)
Currency translation effect on working capital	(16,247)	(18,208)	(15,104)
Accounts payable and accrued liabilites	(14,675)	3,250	417
Increase (Decrease) in Other Current Liabilities	8,663	125,695	67,253
Increase (Decrease) in Other Noncurrent Liabilities	(7,637)	18,723	(5,711)
Deferred income tax provision	(11,293)	(26,785)	829
Net loss (gain) on dispositions of property and equipment	502	(1,012)	(1,083)
Noncash compensation	12,807	12,057	10,370
Other Noncash Expense	1,275
Other Noncash Income		2,370	1,574
Total adjustments to net income	55,746	112,552	94,942
Cost, Depreciation and Amortization	103,443	104,960	120,969
Net Cash Provided by Operating Activities	203,214	209,955	120,883
Cash Flows from Investing Activities:
Purchases of property and equipment	(107,136)	(100,726)	(81,043)
Business acquisitions, net of cash acquired	(27,149)
Proceeds from Sale of Debt Securities, Available-for-sale	0	6,229	0
Payments to Acquire Debt Securities, Available-for-Sale	(7,000)
Proceeds from Sale of Equity Method Investments	11,800
Distributions of capital from unconsolidated affiliates	3,182	2,520	705
Dispositions of property and equipment and life insurance proceeds	217	7,847	6,473
Payments for (Proceeds from) Other Investing Activities	1,915	(2,223)	(3,000)
Net Cash Used in Investing Activities	(124,171)	(86,353)	(76,865)
Cash Flows from Financing Activities:
Repayments of Senior Debt	0	(400,000)	0
Proceeds from Debt, Net of Issuance Costs		177,671
Purchases of treasury stock	(20,046)
Payments Related to Tax Withholding for Share-based Compensation	(6,884)	(4,968)	(1,862)
Payments of Debt Issuance Costs	(112)
Net Cash Provided by (Used in) Financing Activities	(27,042)	(227,297)	(1,862)
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations	(16,051)	(3,484)	(11,525)
Net Increase (Decrease) in Cash and Cash Equivalents	35,950	(107,179)	30,631
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	497,516	461,566	$ 568,745	$ 538,114
Cash and Cash Equivalents-Beginning of Period	461,566
Cash and Cash Equivalents-End of Period	$ 497,516	$ 461,566