Revolving Credit Facility	9 Months Ended
Revolving Credit Facility	Sep. 30, 2013
Debt Disclosure [Abstract]
Revolving Credit Facility	Revolving Credit Facility On September 30, 2013, the Company entered into an agreement to amend its existing revolving credit facility with five commercial lenders (as amended, the “Unsecured Credit Facility”). The amount of the Unsecured Credit Facility was increased from $175,000,000 to $205,000,000 and the amount of permitted acquisition investments over the previous twelve-month period was increased from 10% to 20% of the Company’s consolidated tangible net worth and included an additional allowance for permitted acquisition investments of up to $60,000,000 during the period beginning September 30, 2013, and ending December 31, 2013. The Unsecured Credit Facility continues to bear interest at the prevailing 30-day LIBOR rate plus a fixed spread of 2.0% and matures in February 2015. The interest rate on amounts outstanding under the Unsecured Credit Facility was 2.19% at September 30, 2013. At September 30, 2013, the Company had $152,500,000 outstanding under the Unsecured Credit Facility and $52,500,000 available for borrowings. During the nine months ended September 30, 2013, the Company received net proceeds of $50,000,000 from the Unsecured Credit Facility.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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