Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows from Operating Activities
Net income	$ 29,184	$ 22,899
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and amortization	8,441	8,610
Distributions received from equity method investee	7,131	3,300
Gain on property insurance recoveries	0	(230)
Gain on sale of assets	0	(871)
Deferred income taxes, including change in valuation allowance	356	(1,216)
Share-based compensation	2,130	1,538
Gain on sale of equity method investment	(11,381)	0
Equity method investment (earnings) loss	348	(2,260)
Changes in Operating Assets and Liabilities:
Receivables, net	(11,366)	(6,504)
Inventory	(10,794)	(16,910)
Prepaid expenses	(824)	283
Accounts payable	4,193	(3,340)
Accounts payable to affiliate, net	(3,349)	193
Accrued expenses	790	(2,241)
Income taxes payable	2,472	(642)
Deferred credit	(617)	(223)
Accrued retirement health and life insurance benefits	(267)	(542)
Net cash provided by operating activities	16,447	1,844
Cash Flows from Investing Activities
Additions to plant, property and equipment	(13,630)	(12,666)
Return of equity method investment	22,832	0
Proceeds from property insurance recoveries	14	230
Proceeds from sale of property and other	0	1,208
Net cash provided by (used in) investing activities	9,216	(11,228)
Cash Flows from Financing Activities
Stock shares repurchased	(1,377)	(1,518)
Payment of dividends	(16,692)	(1,722)
Proceeds on long-term debt	20,000	0
Principal payments on long-term debt	(268)	(2,259)
Proceeds from credit facility	20,580	23,408
Payments on credit facility	(41,985)	(9,158)
Loan fees incurred with borrowings	(377)	(114)
Net cash provided by (used in) financing activities	(20,119)	8,637
(Increase) Decrease in cash and cash equivalents	5,544	(747)
Cash and cash equivalents, beginning of year	1,569	747
Cash and cash equivalents, end of period	$ 7,113	$ 0