Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash Flows from Operating Activities
Net income	$ 50,692	$ 37,384
Loss from discontinued operations	0	(405)
Income from continuing operations	50,692	37,789
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	15,449	16,427
Stock compensation expense	6,854	5,069
Net gain on sale of assets	(203)	(139)
Exit activity costs (recoveries), non-cash	1,088	(1,931)
Benefit of deferred income taxes	0	(136)
Other, net	1,317	1,411
Changes in operating assets and liabilities, excluding the effects of acquisitions:
Accounts receivable	(30,534)	(42,310)
Inventories	(16,263)	2,016
Other current assets and other assets	1,052	(2,002)
Accounts payable	9,237	25,134
Accrued expenses and other non-current liabilities	(479)	7,503
Net cash provided by operating activities	38,210	48,831
Cash Flows from Investing Activities
Cash paid for acquisitions, net of cash acquired	(5,241)	(18,494)
Net proceeds from sale of property and equipment	3,147	12,935
Purchases of property, plant, and equipment	(6,767)	(5,152)
Net cash used in investing activities	(8,861)	(10,711)
Cash Flows from Financing Activities
Long-term debt payments	(400)	(400)
Purchase of treasury stock at market prices	(6,549)	(1,982)
Net proceeds from issuance of common stock	1,343	649
Net cash used in financing activities	(5,606)	(1,733)
Effect of exchange rate changes on cash	(610)	1,468
Net increase in cash and cash equivalents	23,133	37,855
Cash and cash equivalents at beginning of year	222,280	170,177
Cash and cash equivalents at end of period	$ 245,413	$ 208,032