Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities
Net (loss) income	$ (2,140)us-gaap_NetIncomeLoss	$ 9,927us-gaap_NetIncomeLoss	$ 17,855us-gaap_NetIncomeLoss
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Impairment charges	5,766	6,239	0
Depreciation and amortization	9,847	9,560	7,451
Debt issuance costs amortization	42us-gaap_AmortizationOfFinancingCosts	83us-gaap_AmortizationOfFinancingCosts	78us-gaap_AmortizationOfFinancingCosts
Deferred income taxes	446us-gaap_DeferredIncomeTaxExpenseBenefit	(390)us-gaap_DeferredIncomeTaxExpenseBenefit	(3,250)us-gaap_DeferredIncomeTaxExpenseBenefit
(Gain) loss on sale of assets	(82)	(62)	80
Gain on sale of business	(218)	(4,890)	0
Gain on purchase of business	(462)	0	0
Unrealized intercompany foreign currency transaction loss (gain)	350	(2,397)	853
Changes in operating assets and liabilities, net of businesses acquired:
Accounts receivable	(7,860)	(68)	17,522
Inventories	(1,303)us-gaap_IncreaseDecreaseInInventories	20,259us-gaap_IncreaseDecreaseInInventories	2,365us-gaap_IncreaseDecreaseInInventories
Other assets	1,655	1,663	4,486
Accounts payable	2,211	(4,083)	(11,538)
Customer deposits	(1,783)	(899)	(7,876)
Accrued expenses	(3,281)	(9,123)	(4,132)
Accrued pension and postretirement liabilities	(9)	9	(455)
Net cash provided by operating activities	3,179	25,828	23,439
Investing activities
Acquisition of businesses, net of cash acquired	(5,683)	(34,250)	(8,768)
Capital expenditures	(3,186)	(3,871)	(7,641)
Proceeds from disposal of business	218	6,255	0
Proceeds on sales of assets	151	179	557
Net cash used in investing activities	(8,500)	(31,687)	(15,852)
Financing activities
Payment of contingent consideration	(7,500)	(299)	0
Proceeds from short-term notes payable to bank	21,143us-gaap_ProceedsFromNotesPayable	47,733us-gaap_ProceedsFromNotesPayable	51,626us-gaap_ProceedsFromNotesPayable
Repayments of short-term notes payable to bank	(21,143)us-gaap_RepaymentsOfNotesPayable	(59,025)us-gaap_RepaymentsOfNotesPayable	(53,537)us-gaap_RepaymentsOfNotesPayable
Proceeds from long-term debt	0	33,821	1,268
Repayments of long-term debt	(9,296)us-gaap_RepaymentsOfLongTermDebt	(15,743)us-gaap_RepaymentsOfLongTermDebt	(1,562)us-gaap_RepaymentsOfLongTermDebt
Debt issuance costs	0us-gaap_PaymentsOfDebtIssuanceCosts	(687)us-gaap_PaymentsOfDebtIssuanceCosts	0us-gaap_PaymentsOfDebtIssuanceCosts
Dividends paid	(1,012)us-gaap_PaymentsOfDividendsCommonStock	(944)us-gaap_PaymentsOfDividendsCommonStock	(931)us-gaap_PaymentsOfDividendsCommonStock
Net proceeds from sales of common stock	5,678	8,884	0
Other financing activities	0	0	(3)
Net cash (used in) provided by financing activities	(12,130)	13,740	(3,139)
Effect of exchange rate changes on cash	(978)	(14)	671
Net (decrease) increase in cash	(18,429)	7,867	5,119
Cash and cash equivalents at beginning of period	34,722	26,855	21,736
Cash and cash equivalents at end of period	$ 16,293	$ 34,722	$ 26,855

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Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from a borrowing supported by a written promise to pay an obligation.

+ References

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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-Publisher FASB

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-Section 45

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585

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- Definition

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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-Publisher FASB

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-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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-Publisher FASB

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-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

The cash outflow for a borrowing supported by a written promise to pay an obligation.

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