Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash Flows from Operating Activities
Net income	$ 17,631	$ 16,454
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,602	5,826
Gain on sale of assets	(138)	0
Share-based compensation	2,267	1,968
Deferred income taxes, including change in valuation allowance	547	729
Changes in operating assets and liabilities:
Receivables, net	(2,807)	(1,411)
Inventory	(9,238)	(13,338)
Prepaid expenses	(514)	(620)
Refundable income taxes	(4,692)	446
Accounts payable	(2,883)	(5,106)
Accrued expenses	(2,750)	(3,232)
Deferred credits	(166)	(362)
Accrued retirement health, and life insurance benefits	211	(111)
Net cash provided by operating activities	3,070	1,243
Cash Flows from Investing Activities
Additions to property, plant, and equipment	(6,192)	(13,065)
Deferred compensation plan investments	(1,177)	0
Net cash used in investing activities	(7,369)	(13,065)
Cash Flows from Financing Activities
Payment of dividends and dividend equivalents	(3,427)	(2,750)
Purchase of treasury stock for tax withholding on equity-based compensation	(5,467)	(2,073)
Proceeds on long-term debt	20,000	0
Principal payments on long-term debt	(192)	(185)
Proceeds from credit agreement - revolver	12,625	16,946
Payments on credit agreement - revolver	(22,025)	(920)
Other	(78)	0
Net cash provided by financing activities	1,436	11,018
Decrease in cash and cash equivalents	(2,863)	(804)
Cash and cash equivalents, beginning of period	5,025	3,084
Cash and cash equivalents, end of period	$ 2,162	$ 2,280