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Subsequent Events	3 Months Ended
	Mar. 31, 2013
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On March 28, 2013, the Company entered into an underwriting agreement with Robert W. Baird & Co. Incorporated, as the representative of several underwriters (the “Underwriters”), which provided for the issuance and sale in an underwritten public offering (the “Offering”) by the Company and the purchase by the Underwriters of 1,321,000 shares of common stock, par value $0.521 per share. The shares in the Offering were sold at a public offering price of $26.50 per share, and were purchased by the Underwriters at a price of $25.44 per share. The Company also granted the Underwriters a 30-day option to purchase up to 198,150 additional shares of common stock to cover over-allotments, if any. On April 25, 2013, the Underwriters exercised the overallotment option to purchase an additional 100,000 shares of common stock. The Offering and overallotment option closed on April 3, 2013 and April 29, 2013, respectively. The net proceeds received from the Offering and overallotment option were approximately $36,150, after deducting the Underwriters' discounts and commissions and estimated offering expenses. The net proceeds will be used to pay down amounts outstanding as of March 31, 2013 under the bank lines of credit, as well as to fund the construction programs of our Water Utility Services operations and for other general corporate purposes. The Offering was made pursuant to the Company's effective registration statement on Form S-3 (Registration No. 333-184984) and the prospectus dated December 21, 2013 included in such registration statement, as supplemented by a preliminary prospectus supplement dated March 27, 2013 and a final prospectus supplement dated March 28, 2013.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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