Capitalization	6 Months Ended
Jun. 30, 2012
Capitalization [Abstract]
Capitalization	Note 7 Capitalization In June 2012, the Company issued $50,000 of senior unsecured notes due in 2027 with an interest rate of 3.57%. In May 2012, in connection with the Company's acquisition in Ohio, the Company assumed $14,281 of long-term debt, which includes a purchase accounting fair value adjustment of $3,578, increasing the carrying value of the long-term debt. The long-term debt assumed has maturity dates ranging from 2026 to 2029 and interest rates ranging from 4.14% to 7.18%. On March 23, 2012, the Company entered into a five-year $150,000 unsecured revolving credit facility with three banks that expires in March 2017. Included within this facility is a $15,000 sublimit for daily demand loans. Funds borrowed under this facility are classified as long-term debt and are used to provide working capital. The Company's $150,000 unsecured revolving credit facility replaced the Company's prior $95,000 unsecured revolving credit facility, which expired in May 2012. In February 2012, the Company renewed its universal shelf registration statement, which expired in December 2011, through a filing with the Securities and Exchange Commission ("SEC"), which allows for the potential future offer and sale by the Company, from time to time, in one or more public offerings, of an indeterminate amount of the Company's common stock, preferred stock, debt securities, and other securities specified therein at indeterminate prices. The Company's Board of Directors has authorized the Company to issue up to $500,000 of the Company's common stock, preferred stock, debt securities, and other securities specified therein under this universal shelf registration statement. No issuances have been completed to date under this shelf registration statement.

Note 7 Capitalization

In June 2012, the Company issued $50,000 of senior unsecured notes due in 2027 with an interest rate of 3.57%. In May 2012, in connection with the Company's acquisition in Ohio, the Company assumed $14,281 of long-term debt, which includes a purchase accounting fair value adjustment of $3,578, increasing the carrying value of the long-term debt. The long-term debt assumed has maturity dates ranging from 2026 to 2029 and interest rates ranging from 4.14% to 7.18%.

On March 23, 2012, the Company entered into a five-year $150,000 unsecured revolving credit facility with three banks that expires in March 2017. Included within this facility is a $15,000 sublimit for daily demand loans. Funds borrowed under this facility are classified as long-term debt and are used to provide working capital. The Company's $150,000 unsecured revolving credit facility replaced the Company's prior $95,000 unsecured revolving credit facility, which expired in May 2012.

In February 2012, the Company renewed its universal shelf registration statement, which expired in December 2011, through a filing with the Securities and Exchange Commission ("SEC"), which allows for the potential future offer and sale by the Company, from time to time, in one or more public offerings, of an indeterminate amount of the Company's common stock, preferred stock, debt securities, and other securities specified therein at indeterminate prices. The Company's Board of Directors has authorized the Company to issue up to $500,000 of the Company's common stock, preferred stock, debt securities, and other securities specified therein under this universal shelf registration statement. No issuances have been completed to date under this shelf registration statement.