NOTES PAYABLE TO BANKS	12 Months Ended
NOTES PAYABLE TO BANKS	Dec. 31, 2012
Line of Credit Facility [Abstract]
NOTES PAYABLE TO BANKS	NOTES PAYABLE TO BANKS The Company had a $200 million unsecured revolving credit facility with a group of seven banks that matured in January 2013. The interest rate on the facility was based on the LIBOR index and varied according to total liability to total asset value ratios (as defined in the credit agreement), with an annual facility fee of 15 to 20 basis points. The interest rate on each tranche was usually reset on a monthly basis and as of December 31, 2012, was LIBOR plus 0.85% with an annual facility fee of 0.20%. At December 31, 2012, the weighted average interest rate was 1.065% on a balance of $71,000,000. The Company had an additional $129,000,000 remaining on the line of credit at that date. The aforementioned credit facility was repaid and replaced in January 2013 with a new four-year, $225 million unsecured credit facility with a group of nine banks with options for a one-year extension and a $100 million expansion. As of February 15, 2013, the interest rate was LIBOR plus 1.175% (1.385%) with an annual facility fee of 0.225%. The margin and facility fee are subject to changes in the Company's credit ratings. The Company also had a $25 million unsecured revolving credit facility with PNC Bank, N.A. that matured in January 2013. This credit facility was customarily used for working capital needs. The interest rate on this working capital line was based on the LIBOR index and varied according to total liability to total asset value ratios (as defined in the credit agreement), with no annual facility fee. The interest rate was reset on a daily basis and as of December 31, 2012, was LIBOR plus 1.65%. At December 31, 2012, the interest rate was 1.859% on a balance of $5,160,000. The Company had an additional $19,840,000 remaining on the line of credit at that date. The $25 million credit facility was repaid and replaced in January 2013 with a new four-year, $25 million unsecured credit facility that automatically extends for one year if the extension option in the new $225 million revolving facility is exercised. As of February 15, 2013, the interest rate, which resets on a daily basis, was LIBOR plus 1.175% (1.377%) with an annual facility fee of 0.225%. The margin and facility fee are subject to changes in the Company's credit ratings. Average bank borrowings were $85,113,000 in 2012 compared to $124,697,000 in 2011 with weighted average interest rates of 1.61% in 2012 compared to 1.41% in 2011. Weighted average interest rates (including amortization of loan costs) were 2.01% for 2012 and 1.65% for 2011. Amortization of bank loan costs was $342,000, $300,000 and $314,000 for 2012, 2011 and 2010, respectively. The Company’s bank credit facilities have certain restrictive covenants, such as maintaining debt service coverage and leverage ratios and maintaining insurance coverage, and the Company was in compliance with all of its debt covenants at December 31, 2012.

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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