Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 26,574	$ 24,036
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,111	11,728
Provision (benefit) for doubtful accounts	(330)	332
Provision for warranties	8,462	8,132
Deferred compensation provision	324	584
Stock-based compensation	856	693
Tax benefit from stock incentive plans	(344)	(498)
Deferred income tax benefit	(3,319)	(2,099)
Gain on disposition of fixed assets	(205)	(141)
Distributions to SERP participants	(2,595)	0
Change in operating assets and liabilities:
(Purchase) sale of trading securities	(736)	94
Trade and other receivables	(10,345)	(23,419)
Inventories	5,410	(13,117)
Prepaid expenses	3,245	2,021
Other assets	8	(2,470)
Accounts payable	(8,516)	6,413
Accrued product warranty	(7,671)	(7,247)
Customer deposits	(13,255)	3,606
Prepaid and income taxes payable, net	2,664	698
Other	2,024	3,676
Net cash provided by operating activities	14,362	13,022
Cash flows from investing activities:
Expenditures for property and equipment	(10,669)	(13,626)
Business acquisition, net of cash acquired	178	(34,965)
Sale of investments	225	16,249
Proceeds from life insurance cash surrender value	416	0
Proceeds from sale of property and equipment	298	196
Net cash used by investing activities	(9,552)	(32,146)
Cash flows from financing activities:
Payment of dividends	(4,595)	(4,582)
Borrowings under bank loans	2,900	5,247
Repayments of bank loans	(477)	0
Tax benefit from stock issued under incentive plans	344	498
(Purchase) sale of Company shares held by SERP, net	2,081	(50)
Withholding tax paid upon vesting of restricted stock units	(600)	(938)
Proceeds from exercise of stock options	0	88
Sale (purchase) of subsidiaries shares to minority shareholders, net	(653)	1,585
Net cash provided (used) by financing activities	(1,000)	1,848
Effect of exchange rates on cash	(480)	336
Net increase (decrease) in cash and cash equivalents	3,330	(16,940)
Cash and cash equivalents, beginning of period	13,023	35,564
Cash and cash equivalents, end of period	$ 16,353	$ 18,624