2.2.0.25falsefalse0203 - Disclosure - Investmentstruefalsefalse1falsefalseUSDfalsefalse1/1/2011 - 3/31/2011 USD ($) USD ($) / shares $FROM_Jan01_2011_TO_Mar31_2011http://www.sec.gov/CIK0001265888duration2011-01-01T00:00:002011-03-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0EPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0us-gaap_ShortTermInvestmentsAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseInvestments [Abstract]3false0us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse003. INVESTMENTSAuction Rate Securities and RightsIn November 2008, the Company accepted a settlement offer in the form of a rights offering (ARS Rights) by the investment firm that brokered the Company's original purchases of auction rate securities (ARS). The ARS Rights provided the Company with rights to sell its ARS at par value to the investment firm during a two year period beginning June 30, 2010. Under the ARS Rights, the investments were completely liquidated on July 1, 2010.The Company elected to measure the ARS Rights at their fair value pursuant to the Financial Instruments Topic of the FASB ASC and to classify the associated ARS as trading securities. During the three months ended March 31, 2010, the Company recorded a loss of $1.1 million, related to the change in estimated fair value of the ARS Rights and a gain of $1.0 million, related to the change in estimated fair value of the ARS.Under the terms of the ARS Rights, if the investment firm was successful in selling any ARS prior to June 30, 2010, the investment firm was obligated to pay the Company par value for any ARS sold. During the three months ended March 31, 2010, the investment firm sold ARS with an original par value of $0.7 million. The Company received this amount in cash from the investment firm and recognized realized gains of $0.1 million. Pre-refunded Municipal Bonds and U.S. Treasury Notes As of December 31, 2010 and March 31, 2011, the Company held approximately $50.8 million and $75.4 million, respectively, in pre-refunded municipal bonds, secured by an escrow fund of U.S. Treasury securities. In addition, as of March 31, 2011, the Company held approximately $20.1 million in U.S. Treasury notes. These investments are accounted for as available-for-sale securities in the Company's consolidated balance sheet pursuant to the Investments – Debt and Equity Securities Topic of the FASB ASC. The Company did not have any sales or record any impairment charges related to these investments during 2010. During the three months ended March 31, 2011, the Company sold approximately $0.3 million of pre-refunded municipal bonds, classified as short-term investments. The following table summarizes the Company's investment in these investments as of December 31, 2010 and March 31, 2011 (in thousands):<div><table style="border-collapse:collapse;margin-top:20px;"><tr style="height: 16px"><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 281px; text-align:left;border-color:#000000;min-width:281px;"> </td><td colspan="8" style="width: 408px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:408px;">December 31, 2010</td></tr><tr style="height: 16px"><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 281px; text-align:left;border-color:#000000;min-width:281px;"> </td><td style="width: 19px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:83px;">Amortized</td><td style="width: 19px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:19px;"> </td><td colspan="3" style="width: 185px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:185px;">Gross Unrealized</td><td style="width: 19px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:83px;">Estimated</td></tr><tr style="height: 16px"><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 281px; text-align:left;border-color:#000000;min-width:281px;"> </td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:83px;"> Cost</td><td style="width: 19px; text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:83px;">Gains</td><td style="width: 19px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:83px;">Losses</td><td style="width: 19px; text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:83px;"> Fair Value</td></tr><tr style="height: 16px"><td colspan="2" style="width: 293px; text-align:left;border-color:#000000;min-width:293px;">Due within one year:</td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:83px;"> </td></tr><tr style="height: 16px"><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 281px; text-align:left;border-color:#000000;min-width:281px;">Municipal bonds</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> 13,782</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> 23</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> (3)</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> 13,802</td></tr><tr style="height: 16px"><td colspan="2" style="width: 293px; text-align:left;border-color:#000000;min-width:293px;">Due after one year through three years:</td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> </td></tr><tr style="height: 16px"><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 281px; text-align:left;border-color:#000000;min-width:281px;">Municipal bonds</td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:83px;"> 36,968</td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:83px;"> 61</td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:83px;"> (20)</td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:83px;"> 37,009</td></tr><tr style="height: 16px"><td colspan="2" style="width: 293px; text-align:left;border-color:#000000;min-width:293px;">Total </td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; border-top-style:solid;border-top-width:1px;border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:83px;"> 50,750</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; border-top-style:solid;border-top-width:1px;border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:83px;"> 84</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; border-top-style:solid;border-top-width:1px;border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:83px;"> (23)</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; border-top-style:solid;border-top-width:1px;border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:83px;"> 50,811</td></tr><tr style="height: 16px"><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 281px; text-align:left;border-color:#000000;min-width:281px;"> </td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:double;border-top-width:3px;text-align:left;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:double;border-top-width:3px;text-align:left;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:double;border-top-width:3px;text-align:left;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:double;border-top-width:3px;text-align:left;border-color:#000000;min-width:83px;"> </td></tr><tr style="height: 16px"><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 281px; text-align:left;border-color:#000000;min-width:281px;"> </td><td colspan="8" style="width: 408px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:408px;">March 31, 2011</td></tr><tr style="height: 16px"><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 281px; text-align:left;border-color:#000000;min-width:281px;"> </td><td style="width: 19px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:83px;">Amortized</td><td style="width: 19px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:19px;"> </td><td colspan="3" style="width: 185px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:185px;">Gross Unrealized</td><td style="width: 19px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:83px;">Estimated</td></tr><tr style="height: 16px"><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 281px; text-align:left;border-color:#000000;min-width:281px;"> </td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:83px;"> Cost</td><td style="width: 19px; text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:83px;">Gains</td><td style="width: 19px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:83px;">Losses</td><td style="width: 19px; text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:83px;"> Fair Value</td></tr><tr style="height: 16px"><td colspan="2" style="width: 293px; text-align:left;border-color:#000000;min-width:293px;">Due within one year:</td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:center;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:83px;"> </td></tr><tr style="height: 16px"><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 281px; text-align:left;border-color:#000000;min-width:281px;">Municipal bonds</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> 29,525</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> 17</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> (6)</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> 29,536</td></tr><tr style="height: 16px"><td colspan="2" style="width: 293px; text-align:left;border-color:#000000;min-width:293px;">Due after one year through three years:</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> </td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> </td></tr><tr style="height: 16px"><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 281px; text-align:left;border-color:#000000;min-width:281px;">Municipal bonds</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> 45,832</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> 63</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> (28)</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; text-align:right;border-color:#000000;min-width:83px;"> 45,867</td></tr><tr style="height: 16px"><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 281px; text-align:left;border-color:#000000;min-width:281px;">U.S. Treasury notes</td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:83px;"> 20,115</td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:83px;"> 14</td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:83px;"> -</td><td style="width: 19px; text-align:left;border-color:#000000;min-width:19px;"> </td><td style="width: 83px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:83px;"> 20,129</td></tr><tr style="height: 16px"><td colspan="2" style="width: 293px; text-align:left;border-color:#000000;min-width:293px;">Total </td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; border-top-style:solid;border-top-width:1px;border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:83px;"> 95,472</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; border-top-style:solid;border-top-width:1px;border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:83px;"> 94</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; border-top-style:solid;border-top-width:1px;border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:83px;"> (34)</td><td style="width: 19px; text-align:right;border-color:#000000;min-width:19px;">$</td><td style="width: 83px; border-top-style:solid;border-top-width:1px;border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:83px;"> 95,532</td></tr></table></div>3. INVESTMENTSAuction Rate Securities and RightsIn November 2008, the Company accepted a settlement offer in the form of a rights offering (ARS Rights) by thefalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis item represents the entire disclosure related to Investments in Certain Debt and Equity Securities (and certain other trading assets) which include all debt and equity securities (other than those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. Other trading assets include assets that are carried on the balance sheet at fair value and held for trading purposes. A debt security represents a creditor relationship with an enterprise that is in the form of a security. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities (and other trading assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 3, 19, 20, 21, 22, 137 falsefalseINVESTMENTS12InvestmentsUnKnownUnKnownUnKnownUnKnownfalsetrue