Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Dec. 31, 2016
Accounting Policies [Abstract]
Consolidation	Consolidation The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany transactions have been eliminated in consolidation.
Receivables	Receivables Receivables consist primarily of trade receivables. The Company does not require collateral or other security and evaluates the collectability of its receivables based on a number of factors. An allowance for doubtful accounts is recorded for significant past due receivable balances based on a review of the past due items and the customer's ability and likelihood to pay, as well as applying a historical write-off ratio to the remaining balances.
Inventories	Inventories Inventories are valued at the lower of cost or market. Cost is determined using the first-in, first-out method. The Company estimates and records provisions for obsolete inventories.
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment are stated at cost. Depreciation is provided over the estimated useful lives of the respective assets by the straight-line method. The estimated useful lives of assets are: for land improvements, 15 years; for buildings and improvements, 10 to 39 years; and for machinery and equipment, 3 to 20 years.
Capitalized Software and Hardware	Capitalized Software and Hardware Capitalized internal use software and hardware included in prepaid expenses and other current assets in the Consolidated Balance Sheets were $2.3 million and $2.0 million at December 31, 2016 and 2015, respectively. In addition, there was $3.3 million and $5.0 million at December 31, 2016 and 2015, respectively, included in other assets in the Consolidated Balance Sheets. These amounts are amortized on a straight-line basis over the estimated useful lives of the software and/or hardware, ranging from 1 to 5 years.
Long-Lived Assets	Long-Lived Assets Property, plant and equipment and identifiable intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. If the sum of the expected undiscounted cash flows is less than the carrying value of the related asset or group of assets, a loss is recognized for the difference between the fair value and carrying value of the asset or group of assets.
Intangible Assets	Intangible Assets Intangible assets are amortized on a straight-line basis over their estimated useful lives, ranging from 5 to 20 years. The Company does not have any intangible assets deemed to have indefinite lives.
Goodwill	Goodwill Goodwill is tested for impairment annually during the fourth fiscal quarter or more frequently if an event indicates that the goodwill might be impaired. Potential impairment is identified by comparing the fair value of a reporting unit with its carrying value.
Revenue Recognition	Revenue Recognition Revenues are generally recognized upon shipment of product, which corresponds with the transfer of title. The costs of shipping are generally billed to the customer upon shipment and are included in cost of sales. A small portion of the Company's sales includes shipments of products combined with services, such as meters sold with installation. The product and installation components of these multiple deliverable arrangements are considered separate units of accounting. The value of these separate units of accounting is determined based on their relative fair values determined on a stand-alone basis. Revenue is generally recognized when the last element of the multiple deliverable is delivered, which corresponds with installation and acceptance by the customer. The Company also sells a small number of extended support service agreements on certain products for the period subsequent to the normal support service provided with the original product sale. Revenue is recognized over the service agreement period, which is generally one year. In 2014, the company began offering software as a service with its BEACON AMA product and revenue for this service is recognized on a monthly basis as the service is performed.
Warranty and After-Sale Costs	Warranty and After-Sale Costs The Company estimates and records provisions for warranties and other after-sale costs in the period in which the sale is recorded, based on a lag factor and historical warranty claim experience. After-sale costs represent a variety of activities outside of the written warranty policy, such as investigation of unanticipated problems after the customer has installed the product, or analysis of water quality issues.
Research and Development	Research and Development Research and development costs are charged to expense as incurred
Stock-Based Compensation Plans	Stock-Based Compensation Plans As of December 31, 2016, the Company has an Omnibus Incentive Plan under which 1,400,000 shares are reserved for restricted stock and stock option grants for employees as well as stock grants for directors as described in Note 5 “Stock Compensation.” The plan was originally approved in 2011 and replaced all prior stock-based plans except for shares and options previously issued under those plans. The Company recognizes the cost of stock-based awards in net earnings for all of its stock-based compensation plans on a straight-line basis over the service period of the awards. The Company estimates the fair value of its option awards using the Black-Scholes option-pricing formula, and records compensation expense for stock options ratably over the stock option grant's vesting period. The Company values restricted stock and stock grants for directors on the closing price of the Company's stock on the day the grant was awarded.
Healthcare	Healthcare The Company estimates and records provisions for healthcare claims incurred but not reported, based on medical cost trend analysis, reviews of subsequent payments made and estimates of unbilled amounts.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
Fair Value Measurements of Financial Instruments	Fair Value Measurements of Financial Instruments The carrying amounts of cash, receivables and payables in the financial statements approximate their fair values due to the short-term nature of these financial instruments. Short-term debt is comprised of notes payable drawn against the Company's lines of credit and commercial paper. Because of its short-term nature, the carrying amount of the short-term debt also approximates fair value. Included in other assets are insurance policies on various individuals who were associated with the Company. The carrying amounts of these insurance policies approximate their fair value.
Subsequent Events	Subsequent Events The Company evaluates subsequent events at the date of the balance sheet as well as conditions that arise after the balance sheet date but before the financial statements are issued. The effects of conditions that existed at the balance sheet date are recognized in the financial statements. Events and conditions arising after the balance sheet date but before the financial statements are issued are evaluated to determine if disclosure is required to keep the financial statements from being misleading. To the extent such events and conditions exist, if any, disclosures are made regarding the nature of events and the estimated financial effects for those events and conditions. For purposes of preparing the accompanying consolidated financial statements and the notes to these financial statements, the Company evaluated subsequent events through the date the accompanying financial statements were issued.
New Pronouncements	New Pronouncements In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02 "Leases (Topic 842)," which requires lessees to record most leases on their balance sheets. Lessees initially recognize a lease liability (measured at the present value of the lease payments over the lease term) and a right-of-use ("ROU") asset (measured at the lease liability amount, adjusted for lease prepayments, lease incentives received and the lessee's initial direct costs). Lessees can make an accounting policy election not to recognize ROU assets and lease liabilities for leases with a lease term of 12 months or less as long as the leases do not include options to purchase the underlying assets that the lessee is reasonably certain to exercise. For lessors, the guidance modifies the classification criteria and the accounting for sales-type and direct financing leases. The ASU is effective for fiscal years beginning after December 15, 2018. Early adoption is permitted for all entities. The ASU is effective for the Company beginning on January 1, 2019 and the standard requires the use of a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. Full retrospective application is prohibited. The Company is continuing to evaluate the impact that the adoption of this guidance will have on its financial condition, results of operations and the presentation of its financial statements. In July 2015, the FASB issued ASU 2015-11 "Simplifying the Measurement of Inventory (Topic 330)," which requires entities to measure inventories at the lower of cost or net realizable value ("NRV"). This simplifies the evaluation from the current method of lower of cost or market, where market is based on one of three measures (i.e. replacement cost, net realizable value, or net realizable value less a normal profit margin). The ASU does not apply to inventories measured under the last-in, first-out method or the retail inventory method, and defines NRV as the "estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation." The ASU is effective on a prospective basis for the Company beginning on January 1, 2017, with early adoption permitted. The adoption of ASU 2015-11 will not have a material impact on the Company's financial condition or results of operations. In May 2014, the FASB issued accounting standards update number 2014-09 “Revenue from Contracts with Customers.” ASU 2014-09 provides a single principles-based, five-step model to be applied to all contracts with customers. The five steps are to identify the contract(s) with the customer, to identify the performance obligations in the contract, to determine the transaction price, to allocate the transaction price to the performance obligations in the contract and to recognize revenue when each performance obligation is satisfied. Revenue will be recognized when promised goods or services are transferred to the customer in an amount that reflects the consideration expected in exchange for those goods or services. In addition, the standard requires disclosure of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. During 2016, the FASB issued additional ASU’s which enhanced the originally issued guidance. These ASU’s encompassed narrow scope improvements and practical expedients along with providing further clarification on the accounting for intellectual property licenses, principal versus agent considerations and identifying performance obligations. The Company has substantially completed the assessment phase for ASU 2014-09 and is currently documenting formal policies in anticipation of adopting the standard on January 1, 2018. The Company has identified a subset of contracts with customers where services are provided that are both uniquely beneficial and separately identifiable from product sales and thus are considered separate performance obligations under the new guidance. Each of these individual service activities is being documented in scenario development and processes are being established to recognize revenue for each unique performance obligation in accordance with the guidance, when effective. The Company continues to proactively address all potential areas of impact related to ASU 2014-09. To date, the Company has not identified any specific aspect of the new standard that it believes would significantly change the Company’s financial statements. The guidance permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (modified retrospective method). The Company currently anticipates adopting the standard using the modified retrospective method.