Short-Term Investments	12 Months Ended
Dec. 31, 2011
Short-Term Investments [Abstract]
Short-Term Investments	2. Short-term Investments As of December 31, 2011, the Company held short-term investments of $4.5 million consisting of investments in CD's with maturities of 26-weeks as of the dates of purchase. Such investments, made at various times during 2011, were purchased through CDARS. During 2011, the Company also held short-term investments in commercial paper and corporate bonds that, at maturity, were fully redeemed. During 2010, the Company liquidated its remaining investments in auction rate securities, or ARS, by exercising the ARS Rights received under a settlement agreement, finalized in the fourth quarter of 2008, with UBS Financial Services, Inc., or UBS. At January 1, 2010, the Company held total investments in ARS with a par value of approximately $11.45 million that were classified as trading securities and held at UBS. These ARS investments represented interests in collateralized debt obligations supported by pools of student loans and none were collateralized by mortgage, credit card or insurance securitizations. The ARS Rights provided the Company with the ability to sell the ARS, along with the ARS Rights, to UBS at the par value of the ARS no earlier than June 30, 2010 and were to expire on July 2, 2012. The ARS Rights were not transferable, not tradable, were not quoted or listed on any securities exchange or any other trading network, were recorded at fair value and were classified as short-term investments. Additionally, UBS also agreed that an affiliate would provide the Company with a no net-cost line of credit. Under the terms of the line of credit agreements, the Company received funds in December 2008 and March 2009 equivalent to 100% of the par value of the Company's ARS investments, providing the Company with full liquidity for all its investments in ARS held with UBS. Upon exercise of the ARS Rights on June 30, 2010 and, after applying the proceeds of the redemptions of those ARS Rights, the Company had no remaining liability under the line of credit. During 2010, based upon analysis of fair value, the Company recorded no additional trading loss related to its trading securities or any corresponding adjustment to the fair value of its ARS or ARS Rights, prior to redemption on June 30, 2010. During the year ended December 31, 2009, the Company recorded a gain of approximately $4.1 million from the recovery of the other-than-temporary impairment that the Company had recorded against investments with an aggregate par value of $11.6 million, classified as available-for-sale, that were redeemed during 2009. Also, during the year ended December 31, 2009, the Company recorded a gain of approximately $0.2 million related to the increased value of the ARS Rights due to the additional funding received under the line of credit and the resulting elimination of any performance risk associated with the settlement. In addition, the Company recorded the recovery of $0.1 million of previously recorded other-than-temporary impairment losses related to $0.3 million in partial redemptions at par of its available-for-sale ARS investments during 2009.

2. Short-term Investments

As of December 31, 2011, the Company held short-term investments of $4.5 million consisting of investments in CD's with maturities of 26-weeks as of the dates of purchase. Such investments, made at various times during 2011, were purchased through CDARS. During 2011, the Company also held short-term investments in commercial paper and corporate bonds that, at maturity, were fully redeemed.

During 2010, the Company liquidated its remaining investments in auction rate securities, or ARS, by exercising the ARS Rights received under a settlement agreement, finalized in the fourth quarter of 2008, with UBS Financial Services, Inc., or UBS. At January 1, 2010, the Company held total investments in ARS with a par value of approximately $11.45 million that were classified as trading securities and held at UBS. These ARS investments represented interests in collateralized debt obligations supported by pools of student loans and none were collateralized by mortgage, credit card or insurance securitizations. The ARS Rights provided the Company with the ability to sell the ARS, along with the ARS Rights, to UBS at the par value of the ARS no earlier than June 30, 2010 and were to expire on July 2, 2012. The ARS Rights were not transferable, not tradable, were not quoted or listed on any securities exchange or any other trading network, were recorded at fair value and were classified as short-term investments. Additionally, UBS also agreed that an affiliate would provide the Company with a no net-cost line of credit. Under the terms of the line of credit agreements, the Company received funds in December 2008 and March 2009 equivalent to 100% of the par value of the Company's ARS investments, providing the Company with full liquidity for all its investments in ARS held with UBS. Upon exercise of the ARS Rights on June 30, 2010 and, after applying the proceeds of the redemptions of those ARS Rights, the Company had no remaining liability under the line of credit. During 2010, based upon analysis of fair value, the Company recorded no additional trading loss related to its trading securities or any corresponding adjustment to the fair value of its ARS or ARS Rights, prior to redemption on June 30, 2010.

During the year ended December 31, 2009, the Company recorded a gain of approximately $4.1 million from the recovery of the other-than-temporary impairment that the Company had recorded against investments with an aggregate par value of $11.6 million, classified as available-for-sale, that were redeemed during 2009. Also, during the year ended December 31, 2009, the Company recorded a gain of approximately $0.2 million related to the increased value of the ARS Rights due to the additional funding received under the line of credit and the resulting elimination of any performance risk associated with the settlement. In addition, the Company recorded the recovery of $0.1 million of previously recorded other-than-temporary impairment losses related to $0.3 million in partial redemptions at par of its available-for-sale ARS investments during 2009.