Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows from Operating Activities
Net income	$ 9,720	$ 8,927
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,810	2,929
Gain on sale of assets	(138)	0
Share-based compensation	1,125	1,191
Deferred income taxes, including change in valuation allowance	145	279
Changes in operating assets and liabilities:
Receivables, net	(5,088)	(185)
Inventory	(2,561)	(5,727)
Prepaid expenses	(943)	(1,005)
Refundable income taxes	(1,649)	1,048
Accounts payable	(3,976)	(2,238)
Accrued expenses	(3,140)	(4,009)
Deferred credits	(83)	(217)
Accrued retirement health, and life insurance benefits	(11)	(114)
Net cash provided by (used in) operating activities	(3,789)	879
Cash Flows from Investing Activities
Additions to property, plant, and equipment	(3,741)	(6,978)
Deferred compensation plan investments	1,166	0
Other	0	(62)
Net cash used in investing activities	(4,907)	(7,040)
Cash Flows from Financing Activities
Payment of dividends and dividend equivalents	(1,714)	(1,375)
Purchase of treasury stock for tax withholding on equity-based compensation	(5,467)	(2,073)
Principal payments on long-term debt	(95)	(93)
Proceeds from credit agreement - revolver	11,025	7,741
Other	(78)	0
Net cash provided by financing activities	3,671	4,200
Decrease in cash and cash equivalents	(5,025)	(1,961)
Cash and cash equivalents, beginning of period	5,025	3,084
Cash and cash equivalents, end of period	$ 0	$ 1,123