Interim Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating Activities
Net income	$ 56,897	$ 41,075
Adjustment to reconcile net income to net cash (used in) provided by operating activities:
Provision for doubtful accounts	(132)	(2)
Depreciation - Property, plant and equipment	9,388	8,631
Depreciation - Rental equipment	4,790	4,253
Amortization of intangibles	2,630	2,445
Amortization of debt issuance costs	166	166
Stock-based compensation expense	1,810	1,254
Deferred income tax expense (benefit)	1,160	(74)
Gain on sale of property, plant and equipment	(298)	(312)
Changes in operating assets and liabilities:
Accounts receivable	(24,916)	(20,330)
Inventories	(31,521)	(4,075)
Rental equipment	(16,758)	(4,327)
Prepaid expenses and other assets	(1,887)	2,828
Trade accounts payable and accrued liabilities	15,797	10,811
Income taxes payable	(8,887)	(665)
Long-term tax liability	(4,969)	0
Other assets and long-term liabilities	317	204
Net cash (used in) provided by operating activities	3,587	41,882
Investing Activities
Payments to Acquire Businesses, Net of Cash Acquired	0	(38,523)
Purchase of property, plant and equipment	(18,781)	(9,686)
Proceeds from sale of property, plant and equipment	1,037	555
Net cash used in investing activities	(17,744)	(47,654)
Financing Activities
Borrowings on bank revolving credit facility	126,000	126,000
Repayments on bank revolving credit facility	(85,000)	(70,000)
Principal payments on long-term debt and capital leases	(82)	(17)
Dividends paid	(3,838)	(3,455)
Proceeds from sale of common stock	2,507	2,059
Redemptions of common stock to satisfy withholding taxes related to stock-based compensation	(436)	(166)
Net cash provided by financing activities	39,151	54,421
Effect of exchange rate changes on cash and cash equivalents	(1,487)	3,626
Cash and Cash Equivalents, Period Increase (Decrease), Total	23,507	52,275
Cash and cash equivalents at beginning of the period	25,373	16,793
Cash and cash equivalents at end of the period	48,880	69,068
Cash paid during the period for:
Interest	3,889	5,073
Income taxes	$ 26,568	$ 20,699