Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows from Operating Activities
Net income	$ 39,351	$ 26,258
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	11,054	9,892
Stock compensation expense	4,171	6,091
Gain on sale of business	(1,881)	0
Exit activity costs, non-cash	346	0
(Benefit of) provision for deferred income taxes	(216)	278
Other, net	1,018	2,437
Changes in operating assets and liabilities, excluding the effects of acquisitions:
Accounts receivable	(25,842)	(41,156)
Inventories	5,661	13,464
Other current assets and other assets	1,996	(4,983)
Accounts payable	(1,732)	4,012
Accrued expenses and other non-current liabilities	(41,181)	(9,807)
Net cash (used in) provided by operating activities	(7,255)	6,486
Cash Flows from Investing Activities
Acquisitions, net of cash acquired	(54,385)	(264)
Net proceeds from sale of property and equipment	59	60
Purchases of property, plant, and equipment	(5,231)	(6,265)
Net proceeds from sale of business	704	0
Net cash used in investing activities	(58,853)	(6,469)
Cash Flows from Financing Activities
Long-term debt payments	0	(212,000)
Payment of debt issuance costs	0	(1,235)
Purchase of treasury stock at market prices	(4,462)	(3,149)
Net proceeds from issuance of common stock	78	208
Net cash used in financing activities	(4,384)	(216,176)
Effect of exchange rate changes on cash	(12)	1,035
Net decrease in cash and cash equivalents	(70,504)	(215,124)
Cash and cash equivalents at beginning of year	191,363	297,006
Cash and cash equivalents at end of period	$ 120,859	$ 81,882