Interim Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating Activities
Net income	$ 17,462	$ 15,528
Adjustment to reconcile net income to net cash provided by operating activities:
Provision for doubtful accounts	(113)	197
Depreciation - Property, plant and equipment	5,247	4,624
Depreciation - Rental equipment	2,207	2,516
Amortization of intangibles	3,658	3,836
Amortization of debt issuance	167	167
Stock-based compensation expense	1,240	933
Provision for deferred income tax (benefit)	(502)	(4,095)
Gain on sale of property, plant and equipment	(615)	(745)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(34,239)	(16,306)
Inventories	(21,552)	(11,675)
Rental equipment	365	1,906
Prepaid expenses and other assets	(712)	(1,139)
Trade accounts payable and accrued liabilities	16,021	2,833
Income taxes payable	2,629	5,829
Long-term tax payable	454	(654)
Other assets and long-term liabilities, net	(318)	1,819
Net cash (used in) provided by operating activities	(8,601)	5,574
Investing Activities
Purchase of property, plant and equipment	(3,477)	(7,378)
Proceeds from sale of property, plant and equipment	681	2,385
Net cash used in investing activities	(2,796)	(4,993)
Financing Activities
Borrowings on bank revolving credit facility	86,000	74,000
Repayments on bank revolving credit facility	(14,000)	(24,000)
Principal payments on long-term debt and finance leases	(3,766)	(3,791)
Dividends paid	(1,654)	(1,528)
Proceeds from exercise of stock options	776	369
Net cash provided by financing activities	67,356	45,050
Effect of exchange rate changes on cash and cash equivalents	(889)	(3,517)
Net change in cash and cash equivalents	55,070	42,114
Cash and cash equivalents at beginning of the year	50,195	42,311
Cash and cash equivalents at end of the period	105,265	84,425
Cash paid during the period for:
Interest	2,557	5,513
Income taxes	$ 2,758	$ 2,690