Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash Flows from Operating Activities
Net income	$ 31,189	$ 16,765
Loss from discontinued operations	0	(405)
Income from continuing operations	31,189	17,170
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,345	11,006
Stock compensation expense	4,828	3,191
Net gain on sale of assets	(52)	(39)
Exit activity recoveries, non-cash	(662)	(2,737)
Other, net	709	628
Changes in operating assets and liabilities, excluding the effects of acquisitions:
Accounts receivable	(22,048)	(14,446)
Inventories	(14,985)	2,245
Other current assets and other assets	(2,840)	(2,174)
Accounts payable	6,064	16,962
Accrued expenses and other non-current liabilities	(16,351)	(10,086)
Net cash (used in) provided by operating activities of continuing operations	(3,803)	21,720
Cash Flows from Investing Activities
Cash paid for acquisitions, net of cash acquired	0	(18,494)
Net proceeds from sale of property and equipment	2,929	12,778
Purchases of property, plant, and equipment	(3,704)	(3,274)
Net cash used in investing activities	(775)	(8,990)
Cash Flows from Financing Activities
Long-term debt payments	(400)	(400)
Purchase of treasury stock at market prices	(6,016)	(1,003)
Net proceeds from issuance of common stock	526	247
Net cash used in financing activities	(5,890)	(1,156)
Effect of exchange rate changes on cash	(1,069)	628
Net (decrease) increase in cash and cash equivalents	(11,537)	12,202
Cash and cash equivalents at beginning of year	222,280	170,177
Cash and cash equivalents at end of period	$ 210,743	$ 182,379