CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net earnings	$ 2,402	$ 3,764	$ 13,649
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	9,072	8,667	8,836
Stock-based compensation	1,767	1,709	2,200
Loss (gain) on disposal/sale of property, plant and equipment	183	(93)	(352)
Impairment/loss on disposal of assets related to restructuring	1,389	0	0
Loss (gain) on sale of investments	142	(119)	0
Impairment of investment	775	0	0
Other, net	97	1,114	715
Deferred income taxes	(1,222)	683	725
Changes in operating assets and liabilities	(2,996)	14,542	(18,136)
Net Cash Provided by Operating Activities	11,609	30,267	7,637
Cash flows from investing activities:
Purchase of property, plant and equipment	(4,744)	(2,928)	(2,427)
Purchase of marketable securities	(24)	(5,135)	(6,190)
(Purchase of) proceeds from surrender of company-owned life insurance, net	0	(2,406)	3,428
Cash transferred (to) from restricted cash	0	(12,830)	250
Payments for acquisitions, net of cash acquired	(19,410)	0	(40,424)
Proceeds from sale of marketable securities	5,119	433	0
Proceeds from disposal/sale of property, plant and equipment	193	386	606
Net Cash Used In Investing Activities	(18,866)	(22,480)	(44,757)
Cash flows from financing activities:
Dividends paid to common shareholders	(3,225)	(3,205)	(3,181)
Decrease in notes payable	(17)	0	0
Purchase and retirement of Class B common stock	(6,644)	0	0
Net Cash Used In Financing Activities	(9,886)	(3,205)	(3,181)
Effect of exchange rate changes on cash	164	(170)	(101)
Net (Decrease) Increase in Cash and Cash Equivalents	(16,979)	4,412	(40,402)
Cash and Cash Equivalents - beginning of year	88,241	83,829	124,231
Cash and Cash Equivalents - end of year	71,262	88,241	83,829
Changes in operating assets and liabilities consist of:
Decrease (increase) in accounts receivable	260	14,172	(12,164)
(Increase) decrease in inventories	(343)	3,561	(17,648)
Increase in prepaid expenses and other current assets	(273)	(1,746)	(833)
Increase in other assets	(230)	(140)	(13)
(Decrease) increase in accounts payable	(1,422)	(2,683)	1,716
Increase in accrued expenses	553	501	12,120
Increase in other liabilities	11	0	0
Increase (decrease) in accrued restructuring costs	122	(507)	(157)
(Decrease) increase in income taxes payable	(1,674)	1,384	(1,157)
Changes in operating assets and liabilities	(2,996)	14,542	(18,136)
Cash paid during the year for:
Income taxes, net of refunds received	1,464	1,947	2,172
Interest	16	0	15
Details of acquisition (see Note 2):
Fair value of identifiable net assets acquired	12,677	0	38,132
Goodwill	9,724	0	2,349
Fair value of net assets acquired	22,401	0	40,481
Fair value of consideration transferred	22,401	0	40,481
Less: Cash acquired in acquisition	(2,991)	0	(57)
Cash paid for acquisition, net of cash acquired	$ 19,410	$ 0	$ 40,424