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 earnings	$ 29,678us-gaap_NetIncomeLoss	$ 24,617us-gaap_NetIncomeLoss	$ 28,032us-gaap_NetIncomeLoss
Adjustments to reconcile net earnings to net cash provided by operations:
Depreciation	8,891us-gaap_Depreciation	8,512us-gaap_Depreciation	7,587us-gaap_Depreciation
Amortization	6,773us-gaap_AdjustmentForAmortization	4,982us-gaap_AdjustmentForAmortization	4,467us-gaap_AdjustmentForAmortization
Deferred income taxes	(1,334)us-gaap_DeferredIncomeTaxExpenseBenefit	1,462us-gaap_DeferredIncomeTaxExpenseBenefit	(551)us-gaap_DeferredIncomeTaxExpenseBenefit
Contributions to pension plan	0us-gaap_PensionContributions	0us-gaap_PensionContributions	(1,097)us-gaap_PensionContributions
Noncurrent employee benefits	4,417	1,392	122
Stock-based compensation expense	1,449us-gaap_ShareBasedCompensation	1,388us-gaap_ShareBasedCompensation	1,266us-gaap_ShareBasedCompensation
Changes in:
Receivables	(997)	(3,991)	812
Inventories	(6,943)us-gaap_IncreaseDecreaseInInventories	247us-gaap_IncreaseDecreaseInInventories	(4,743)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets	(2,060)	368	(905)
Liabilities other than debt	(4,139)	(4,159)	(188)
Total adjustments	6,057	10,201	6,770
Net cash provided by operations	35,735	34,818	34,802
Investing activities:
Property, plant and equipment additions	(12,332)	(14,311)	(8,202)
Acquisitions, net of cash acquired	(20,829)	(15,401)	(51,518)
Net cash used for investing activities	(33,161)	(29,712)	(59,720)
Financing activities:
Net increase (decrease) in short-term debt	6,653	3,205	65,136
Dividends paid	(10,633)us-gaap_PaymentsOfDividendsCommonStock	(10,004)us-gaap_PaymentsOfDividendsCommonStock	(9,513)us-gaap_PaymentsOfDividendsCommonStock
Proceeds from exercise of stock options	730	1,640	382
Tax benefit on stock options	38	382	297
Repurchase of Common Stock	0	0	(30,000)
Issuance of treasury stock	469us-gaap_ProceedsFromSaleOfTreasuryStock	498us-gaap_ProceedsFromSaleOfTreasuryStock	477us-gaap_ProceedsFromSaleOfTreasuryStock
Net cash (used for) provided by financing activities	(2,743)	(4,279)	26,779
Effect of foreign exchange rates on cash	(438)	(118)	(282)
(Decrease) increase in cash	(607)	709	1,579
Cash — beginning of year	7,263us-gaap_Cash	6,554us-gaap_Cash	4,975us-gaap_Cash
Cash — end of year	6,656us-gaap_Cash	7,263us-gaap_Cash	6,554us-gaap_Cash
Cash paid during the year for:
Income taxes	17,218us-gaap_IncomeTaxesPaid	15,292us-gaap_IncomeTaxesPaid	15,247us-gaap_IncomeTaxesPaid
Interest	1,144us-gaap_InterestPaid	1,114us-gaap_InterestPaid	1,113us-gaap_InterestPaid
Settlement of National Meter and Automation, Inc. accounts payable prior to the acquisition	$ 2,623	$ 0	$ 0

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (j)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

+ Details

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

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