Interim Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating Activities
Net income	$ 43,499	$ 28,517
Adjustment to reconcile net income to net cash provided by operating activities:
Provision for doubtful accounts	115	416
Depreciation - Property, plant and equipment	10,546	9,407
Depreciation - Rental equipment	4,418	5,158
Amortization of intangibles	7,321	7,449
Amortization of debt issuance	334	334
Stock-based compensation expense	2,556	2,036
Provision for deferred income tax (benefit)	500	(3,328)
Gain on sale of property, plant and equipment	(4,160)	(883)
Changes in operating assets and liabilities:
Accounts receivable	(43,235)	3,408
Inventories	(34,621)	15,283
Rental equipment	(772)	2,726
Prepaid expenses and other assets	(13)	2,834
Trade accounts payable and accrued liabilities	27,283	(23,913)
Income taxes payable	(3,414)	9,192
Long-term tax payable	454	(654)
Other assets and long-term liabilities, net	(1,415)	728
Net cash provided by operating activities	9,396	58,710
Investing Activities
Purchase of property, plant and equipment	(9,357)	(12,545)
Proceeds from sale of property, plant and equipment	9,312	3,163
Net cash used in investing activities	(45)	(9,382)
Financing Activities
Borrowings on bank revolving credit facility	103,000	89,000
Repayments on bank revolving credit facility	(66,000)	(83,000)
Principal payments on long-term debt and finance leases	(7,537)	(11,320)
Dividends paid	(3,311)	(3,059)
Proceeds from exercise of stock options	174	(104)
Net cash provided (used) by financing activities	26,326	(8,483)
Effect of exchange rate changes on cash and cash equivalents	(242)	(1,154)
Net change in cash and cash equivalents	35,435	39,691
Cash and cash equivalents at beginning of the year	50,195	42,311
Cash and cash equivalents at end of the period	85,630	82,002
Cash paid during the period for:
Interest	5,207	10,545
Income taxes	$ 15,647	$ 4,137