CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows from Operating Activities
Net income	$ 31,966	$ 34,206	$ 39,214
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	20,744	21,343	20,966
Amortization	3,334	3,033	1,299
Provision for doubtful accounts	18	1,011	629
Provision for warranties	13,743	12,796	12,199
Deferred compensation provision	241	74	601
Deferred income tax benefit	(2,559)	(2,544)	(2,220)
Gain on disposition of fixed assets	(529)	(306)	(163)
Tax expense (benefit) from stock incentive plans	(345)	(586)	8
Stock-based compensation	1,250	1,200	1,461
Distributions to SERP participants	(2,986)	0	0
Change in operating assets and liabilities:
Sale (purchase) of trading securities, net	(405)	118	(1,350)
Trade and other receivables	3,163	(6,924)	(8,849)
Inventories	(6,499)	(41,933)	(36,561)
Prepaid expenses	(3,016)	(3,989)	(5,433)
Other assets	(968)	(4,763)	(3,215)
Accounts payable	(11,409)	10,755	1,028
Customer deposits	(3,697)	5,483	(5,436)
Accrued product warranty	(14,177)	(15,563)	(10,163)
Income taxes payable	(4,093)	(1,136)	(823)
Accrued retirement benefit costs	24	(201)	(324)
Accrued loss reserves	103	305	199
Other accrued liabilities	3,576	3,289	1,085
Other	3,387	3,195	1,709
Net cash provided by operating activities	30,866	18,863	5,861
Cash Flows from Investing Activities
Business acquisitions, net of cash acquired	178	(34,965)	0
Proceeds from sale of property and equipment	10,054	743	424
Expenditures for property and equipment	(21,202)	(24,851)	(27,673)
Sale (purchase) of investments	378	16,249	(15,000)
Net cash used by investing activities	(10,592)	(42,824)	(42,249)
Cash Flows from Financing Activities
Payment of dividends	(9,193)	(9,167)	(6,856)
Borrowings under bank loans	106,034	113,547	0
Repayment of bank loans	(104,567)	(103,188)	0
Proceeds from issuance of common stock	72	282	112
Tax (expense) benefit from stock option exercise	345	586	(8)
Sale (purchase) of shares of subsidiaries, net	(653)	1,428	735
Sale (purchase) of company shares by SERP, net	2,084	(95)	213
Withholding tax paid upon vesting of restricted stock units	(600)	(953)	(782)
Proceeds from cash surrender value of life insurance	416	0	0
Net cash provided (used) by financing activities	(6,062)	2,440	(6,586)
Effect of exchange rates on cash	(2,173)	(1,020)	(2,391)
Increase (decrease) in cash and cash equivalents	12,039	(22,541)	(45,365)
Cash and cash equivalents, beginning of year	13,023	35,564	80,929
Cash and cash equivalents, end of year	25,062	13,023	35,564
Cash paid during the year for:
Interest	1,651	476	229
Income taxes, net of refunds	$ 29,573	$ 23,027	$ 20,331