CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Cash flows from operating activities:
Net earnings	$ 15,908	[1]	$ 2,373	[1]	$ 3,764
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	12,382		9,113		8,667
Stock-based compensation	1,879		1,767		1,709
(Gain) loss on disposal/sale of property, plant and equipment	(69)		183		(93)
Impairment/loss on disposal of assets related to restructuring	0		1,389		0
(Gain) loss on sale of investments	(98)		142		(119)
Impairment of investment	0		775		0
Other, net	574		97		1,114
Deferred income taxes	(877)		(1,234)		683
Changes in operating assets and liabilities	(19,118)		(2,996)		14,542
Net Cash Provided by Operating Activities	10,581		11,609		30,267
Cash flows from investing activities:
Purchase of property, plant and equipment	(6,940)		(4,744)		(2,928)
Payments for intangible assets	(1,336)		0		0
Purchase of marketable securities	0		(24)		(5,135)
Purchase of company-owned life insurance, net	(2,820)		0		(2,406)
Cash transferred (to) from restricted cash	12,993		0		(12,830)
Payments for acquisitions, net of cash acquired	(30,994)		(19,410)		0
Proceeds from sale of marketable securities	2,820		5,119		433
Proceeds from disposal/sale of property, plant and equipment	96		193		386
Net Cash Used In Investing Activities	(26,181)		(18,866)		(22,480)
Cash flows from financing activities:
Borrowings under revolving credit line	12,000		0		0
Dividends paid to common shareholders	(3,111)		(3,225)		(3,205)
Increase (reduction) in notes payable	506		(17)		0
Purchase and retirement of Class B common stock	(3,356)		(6,644)		0
Net Cash Provided By (Used In) Financing Activities	6,039		(9,886)		(3,205)
Effect of exchange rate changes on cash	422		164		(170)
Net (Decrease) Increase in Cash and Cash Equivalents	(9,139)		(16,979)		4,412
Cash and Cash Equivalents - beginning of year	71,262		88,241		83,829
Cash and Cash Equivalents - end of year	62,123		71,262		88,241
Changes in operating assets and liabilities consist of:
(Increase) decrease in accounts receivable	(8,025)		260		14,172
(Increase) decrease in inventories	(6,538)		(343)		3,561
Decrease (increase) in prepaid expenses and other current assets	1,702		(273)		(1,746)
Increase in other assets	(62)		(230)		(140)
Increase (decrease) in accounts payable	1,485		(1,422)		(2,683)
(Decrease) increase in accrued expenses	(7,548)		553		501
Increase in other liabilities	165		11		0
(Decrease) increase in accrued restructuring costs	(122)		122		(507)
(Decrease) increase in income taxes payable	(175)		(1,674)		1,384
Changes in operating assets and liabilities	(19,118)		(2,996)		14,542
Cash (received) paid during the year for:
Income taxes, net of refunds received	(474)		1,464		1,947
Interest	156		16		0
Details of acquisition (see Note 2):
Fair value of identifiable net assets acquired	34,737		13,336		0
Goodwill	4,616		9,065		0
Fair value of net assets acquired	39,353		22,401		0
Fair value of consideration transferred	39,353		22,401		0
Less: Cash acquired in acquisition	(8,359)		(2,991)		0
Cash paid for acquisition, net of cash acquired	$ 30,994		$ 19,410		$ 0

[1] Quarterly amounts of earnings per share may not agree to the total for the year due to rounding.