Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income (loss)	$ 7,673	$ 3,052	$ (1,993)
Depreciation and amortization	6,778	7,676	8,209
Deferred income taxes	1,981	(756)	(2,093)
Provision for inventory reserves	255	556	1,022
Assets held for sale write-down	1,135	500	717
Other, net	357	174	458
Change in assets and liabilities (net of the effect of acquisition):
Accounts receivable, net	518	(2,669)	5,318
Inventories, net	(439)	(2,482)	5,878
Accounts payable and accrued liabilities	(1,810)	1,700	(356)
Accounts with affiliates	(839)	2,520	(15)
Income taxes	471	2,704	(2,778)
Other, net	(108)	44	899
Net cash provided by operating activities	15,972	13,019	15,266
Cash flows from investing activities:
Capital expenditures	(3,195)	(2,120)	(2,321)
Acquisition, net of cash acquired	(4,752)
Purchase of promissory note receivable		(15,000)
Note receivable from affiliate:
Advances		(9,000)
Collections		9,000
Proceeds from sale of fixed assets	184
Cash collected on promissory notes receivable	15,000		261
Net cash provided by (used in)investing activities	7,237	(17,120)	(2,060)
Cash flows from financing activities:
Borrowings under long-term debt	5,294	5,000
Repayment of long-term debt	(5,898)	(2,000)
Repayment of loan from affiliate	(20,000)		(750)
Dividends paid	(6,192)	(6,187)	(6,184)
Other, net	62	(28)	(133)
Net cash used in financing activities	(26,734)	(3,215)	(7,067)
Net increase (decrease)	(3,525)	(7,316)	6,139
Cash and cash equivalents:
Net increase (decrease) from - Operating, investing and financing activities	(3,525)	(7,316)	6,139
Effect of exchange rate on cash	(313)	447	238
Balance at beginning of year	13,919	20,788	14,411
Balance at end of year	10,081	13,919	20,788
Supplemental disclosures:
Interest	1,611	278	1,246
Income taxes	5,822	1,241	1,819
Noncash investing and financing activities:
Accrual for capital expenditures	$ 178	$ 159	$ 101