CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Cash flows from operating activities:
Consolidated net income	$ 40,773	[1]	$ 51,095	[2]	$ 62,307	[3]
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	38,280		37,052		30,758
Provision for inventory excess and obsolescence	3,188		1,898		1,421
Share-based compensation	9,340		7,714		5,493
Deferred income taxes	(4,332)		(6,076)		(2,560)
Earnings from equity-method investment					(104)
Gain on acquisition of business					(26,409)
Loss on disposal of fixed assets	756		106		36
Contingent consideration adjustments	100				425
Inventory acquisition fair value adjustment	1,270				4,754
Non-cash interest expense	1,055		955		825
Other non-cash items	259		(165)		283
Changes in assets and liabilities which provided/(used) cash, excluding effects from businesses acquisitions:
Accounts receivable	(3,600)		(1,156)		(2,077)
Inventories	(7,397)		(15,603)		(13,587)
Prepaid expenses and other current assets	(1,526)		1,350		(2,169)
Prepaid income taxes, income taxes receivable and income taxes payable	(4,966)		(1,485)		(2,900)
Accounts payable, accrued expenses and other current liabilities	(14,800)		14,888		9,611
Other non-current assets and liabilities	4,848		(926)		(2,729)
Cash provided by operating activities	63,248		89,647		63,378
Cash flows from investing activities:
Purchases of property, plant and equipment	(10,743)		(14,658)		(9,094)
Acquisition of businesses, net of cash acquired and working capital adjustments	(53,143)		(29,600)		(168,332)
Acquisition of assets			(1,599)
Proceeds from sale of property, plant and equipment	42		267		46
Cash used in investing activities	(63,844)		(45,590)		(177,380)
Cash flows from financing activities:
Borrowings under revolving credit facilities	66,792		55,253		176,769
Repayments under term loan and revolving credit facilities	(50,694)		(74,648)		(26,925)
Payments of debt issuance costs	(2,655)				(655)
Payments of withholding taxes from share-based awards	(6,935)		(3,556)		(2,090)
Payments of contingent considerations					(2,546)
Repurchases of common shares	(10,000)		(5,850)		(370)
Acquisition of noncontrollling interest			(30,800)
Other financing activities	(443)		(563)		(853)
Cash provided by (used in) financing activities	(3,935)		(60,164)		143,330
Effect of exchange rates on cash and cash equivalents	1,432		(1,907)		2,621
Increase (decrease) in cash and cash equivalents	(3,099)		(18,014)		31,949
Cash and cash equivalents, beginning of year	82,043		100,057		68,108
Cash and cash equivalents, end of year	78,944		82,043		100,057
Supplemental disclosure of cash flow information:
Cash paid for interest	8,389		8,924		5,832
Cash paid for income taxes	14,260		20,323		21,121
Income tax refunds received	767		3,011		337
Supplemental disclosure of non-cash investing activity:
Accrual for capital expenditures	$ 638		$ 1,187		$ 1,601

[1] For the year ended December 31, 2019, 46 non-GAAP EPS performance-based restricted stock units granted to certain members of the executive management team and 213 shares of restricted stock issued to Laser Quantum former non-controlling interest shareholders are considered contingently issuable shares and were excluded from the calculation of the denominator as the contingent conditions had not been met as of December 31, 2019.

[2] For the year ended December 31, 2018, 54 non-GAAP EPS performance-based restricted stock units granted to certain members of the executive management team and 213 shares of restricted stock issued to Laser Quantum former non-controlling interest shareholders were considered contingently issuable shares and were excluded from the calculation of the denominator as the contingent conditions had not been met as of December 31, 2018.

[3] For the year ended December 31, 2017, 59 non-GAAP EPS performance-based restricted stock units granted to certain members of the executive management team were excluded from the calculation of the denominator as the contingent conditions had not been met as of December 31, 2017.