Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Activities
Net income	$ 136,161	$ 101,928	$ 80,245
Adjustments to reconcile net income to cash provided by operating activities:
Provision for doubtful accounts	253	424	506
Depreciation - PP&E	23,665	23,673	21,229
Depreciation - Rental	8,789	7,739	8,613
Amortization of intangibles	15,519	15,277	14,637
Amortization of debt issuance	703	667	667
Stock-based compensation expense	7,424	5,561	5,987
Provision for deferred income tax benefit	(4,253)	(2,337)	(1,182)
Gain on sale of property, plant and equipment	(6,621)	(161)	(3,779)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(35,293)	(85,055)	(27,571)
Inventories	(10,844)	(37,739)	(78,463)
Rental equipment	(13,930)	(9,196)	1,138
Prepaid expenses and other	(835)	(6,146)	(6,994)
Trade accounts payable and accrued liabilities	4,813	(2,879)	32,532
Income taxes payable	6,705	2,934	4,648
Long term tax payable	(1,147)	(635)	462
Other assets and liabilities, net	45	475	(3,008)
Net cash provided by operating activities	131,154	14,530	49,667
Investing Activities
Acquisitions, net of cash acquired	(27,560)	(2,000)	(17,798)
Purchase of property, plant and equipment	(37,745)	(31,141)	(25,263)
Proceeds from sale of property, plant and equipment	12,682	1,566	9,667
Purchase of patents	0	(163)	(44)
Net cash used in investing activities	(52,623)	(31,738)	(33,438)
Financing Activities
Borrowings on bank revolving credit facility	183,000	222,000	188,000
Repayment on bank revolving credit facility	(235,000)	(174,000)	(189,000)
Principal payments on long-term debt and capital leases	(14,948)	(15,031)	(15,093)
Dividends paid	(10,485)	(8,549)	(6,627)
Proceeds from exercise of stock options	1,586	803	1,676
Common stock repurchased	(1,034)	(768)	(1,957)
Net cash (used in) provided by financing activities	(76,881)	24,455	(23,001)
Effect of exchange rate changes on cash	3,253	(2,346)	(1,308)
Net change in cash and cash equivalents	4,903	4,901	(8,080)
Cash and cash equivalents at beginning of the year	47,016	42,115	50,195
Cash and cash equivalents at end of the year	51,919	47,016	42,115
Cash paid during the year for:
Interest	25,358	14,575	10,248
Income taxes	$ 37,330	$ 35,102	$ 32,865