CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Consolidated net income	$ 51,095	$ 62,307	$ 22,003
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	37,052	30,758	20,357
Provision for inventory excess and obsolescence	1,898	1,421	3,091
Share-based compensation	7,714	5,493	4,293
Deferred income taxes	(6,076)	(2,560)	(1,766)
Earnings from equity-method investment		(104)	(2,191)
Dividend from equity-method investment			2,341
Gain on acquisition of business		(26,409)
(Gain) loss on sale of fixed assets	106	36	(1,707)
Contingent consideration adjustments		425	1,267
Inventory acquisition fair value adjustment		4,754	173
Non-cash interest expense	955	825	882
Other non-cash items	(165)	283	813
Changes in assets and liabilities which provided/(used) cash, excluding effects from businesses acquisitions:
Accounts receivable	(1,156)	(2,077)	(6,394)
Inventories	(15,603)	(13,587)	(2,917)
Prepaid expenses and other current assets	1,350	(2,169)	(1,729)
Prepaid income taxes and income taxes receivable	2,165	(2,282)	462
Accounts payable, income taxes payable, accrued expenses and other current liabilities	11,238	8,993	10,590
Other non-current assets and liabilities	(926)	(2,729)	(1,780)
Cash provided by operating activities	89,647	63,378	47,788
Cash flows from investing activities:
Purchases of property, plant and equipment	(14,658)	(9,094)	(8,462)
Acquisition of businesses, net of cash acquired and working capital adjustments	(29,600)	(168,332)	(8,958)
Acquisition of assets	(1,599)		(3,980)
Release of escrow from sale of business			1,498
Proceeds from sale of property, plant and equipment	267	46	7,037
Cash used in investing activities	(45,590)	(177,380)	(12,865)
Cash flows from financing activities:
Borrowings under revolving credit facility	55,253	176,769
Repayments of term loan and revolving credit facility	(74,648)	(26,925)	(16,250)
Payments of debt issuance costs		(655)	(2,523)
Payments of withholding taxes from stock-based awards	(3,556)	(2,090)	(1,789)
Payments of contingent considerations		(2,546)
Repurchases of common stock	(5,850)	(370)	(1,634)
Acquisition of noncontrollling interest	(30,800)
Other financing activities	(563)	(853)	(993)
Cash provided by (used in) financing activities	(60,164)	143,330	(23,189)
Effect of exchange rates on cash and cash equivalents	(1,907)	2,621	(3,585)
Increase (decrease) in cash and cash equivalents	(18,014)	31,949	8,149
Cash and cash equivalents, beginning of year	100,057	68,108	59,959
Cash and cash equivalents, end of year	82,043	100,057	68,108
Supplemental disclosure of cash flow information:
Cash paid for interest	8,924	5,832	2,917
Cash paid for income taxes	20,323	21,121	14,058
Income tax refunds received	3,011	337	932
Supplemental disclosure of non-cash investing activity:
Accrual for capital expenditures	$ 1,187	$ 1,601	$ 1,253