Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income (loss)	$ (13,649)	$ 26,736
Adjustments to reconcile net income (loss) to net cash provided (used) by operating activities:
Depreciation and amortization	20,755	19,253
Provision for doubtful accounts	145	216
Provision for warranties	10,115	11,842
Deferred compensation benefit	(441)	(725)
Stock-based compensation	1,770	2,774
Deferred income tax provision (benefit)	1,587	(224)
Gain on disposition of fixed assets	(249)	(292)
Distributions to SERP participants	(291)	(206)
Change in operating assets and liabilities:
Sale (purchase) of trading securities, net	(628)	74
Trade and other receivables	(7,512)	766
Inventories	(37,841)	(39,332)
Prepaid expenses and other assets	796	4,601
Accounts payable	14,047	2,820
Accrued pellet plant agreement costs	17,000	0
Accrued product warranty	(14,480)	(11,072)
Customer deposits	2,895	11,040
Prepaid and income taxes payable, net	(11,055)	(16,246)
Other	(3,498)	(1,276)
Net cash provided (used) by operating activities	(20,534)	10,749
Cash flows from investing activities:
Expenditures for property and equipment	(17,518)	(13,920)
Proceeds from sale of property and equipment	330	337
Other	83	(580)
Net cash used by investing activities	(17,105)	(14,163)
Cash flows from financing activities:
Payment of dividends	(7,149)	(6,920)
Stock buy-back purchases	(13,914)	0
Borrowings under bank loans	48,523	0
Repayments of bank loans	(24,741)	(6,583)
Sale of Company shares held by SERP	246	126
Withholding tax paid upon vesting of restricted stock units	(432)	(501)
Purchase of subsidiary shares	(27)	(31)
Net cash provided (used) by financing activities	2,506	(13,909)
Effect of exchange rates on cash	(1,473)	1,331
Net change in cash and cash equivalents	(36,606)	(15,992)
Cash and cash equivalents, beginning of period	62,280	82,371
Cash and cash equivalents, end of period	$ 25,674	$ 66,379