Pledged Treasury Securities	12 Months Ended
Dec. 31, 2011
Pledged Treasury Securities [Abstract]
Pledged Treasury Securities	8. Pledged Treasury Securities Approximately $29.3 million of mortgage debt was defeased in connection with the sale of an office building in 2007. The defeasance transaction resulted in the establishment of a defeasance trust and deposit of proceeds of $31.1 million which will be used to pay down the related mortgage debt (see Note 12). The proceeds were invested in government backed securities which were pledged to provide principal and interest payments for the mortgage debt previously collateralized by the commercial building. The investments have been included, and the related debt continues to be included, in the Company's Consolidated Balance Sheets at December 31, 2011 and 2010. The Company has classified the defeasance trust investment as held-to-maturity because the Company has both the intent and the ability to hold the securities to maturity. Accordingly, the Company has recorded the investment at cost, adjusted for the amortization of a premium, which approximates market value of $23.3 million at December 31, 2011.

8. Pledged Treasury Securities

Approximately $29.3 million of mortgage debt was defeased in connection with the sale of an office building in 2007. The defeasance transaction resulted in the establishment of a defeasance trust and deposit of proceeds of $31.1 million which will be used to pay down the related mortgage debt (see Note 12). The proceeds were invested in government backed securities which were pledged to provide principal and interest payments for the mortgage debt previously collateralized by the commercial building. The investments have been included, and the related debt continues to be included, in the Company's Consolidated Balance Sheets at December 31, 2011 and 2010. The Company has classified the defeasance trust investment as held-to-maturity because the Company has both the intent and the ability to hold the securities to maturity. Accordingly, the Company has recorded the investment at cost, adjusted for the amortization of a premium, which approximates market value of $23.3 million at December 31, 2011.