Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows from Operating Activities
Net income	$ 28,713	$ 25,846
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,618	8,537
Loss (gain) on sale of assets	337	(138)
Share-based compensation	2,693	2,752
Deferred income taxes, including change in valuation allowance	460	952
Changes in operating assets and liabilities:
Receivables, net	(11,683)	(1,757)
Inventory	(5,673)	(17,424)
Prepaid expenses	(2,032)	(326)
Refundable income taxes	(673)	(2,138)
Accounts payable	2,196	(331)
Accrued expenses	5,647	(3,236)
Deferred credits	(198)	(249)
Other, net	52	(75)
Net cash provided by operating activities	29,457	12,413
Cash Flows from Investing Activities
Additions to property, plant, and equipment	(13,507)	(10,375)
Deferred compensation plan investments	0	(1,189)
Acquisition of business	(2,750)	0
Proceeds from sale of property	688	0
Other, net	56	0
Net cash used in investing activities	(15,513)	(11,564)
Cash Flows from Financing Activities
Payment of dividends and dividend equivalents	(6,144)	(5,141)
Purchase of treasury stock	(4,395)	(5,470)
Loan fees paid related to borrowings	(1,148)	0
Proceeds from long-term debt	0	20,000
Principal payments on long-term debt	(300)	(288)
Proceeds from credit agreement - revolver	54,700	14,140
Payments on credit agreement - revolver	(40,000)	(24,640)
Other, net	0	(78)
Net cash provided by (used in) financing activities	2,713	(1,477)
Increase (decrease) in cash and cash equivalents	16,657	(628)
Cash and cash equivalents, beginning of period	3,309	5,025
Cash and cash equivalents, end of period	$ 19,966	$ 4,397