2.2.0.25falsefalse01180 - Disclosure - Off-Balance Sheet Arrangementstruefalsefalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $FROM_Jan01_2010_TO_Dec31_2010http://www.sec.gov/CIK0000911421duration2010-01-01T00:00:002010-12-31T00:00:00SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0EPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0us-gaap_FairValueOffBalanceSheetRisksAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseDisclosure - Off-Balance Sheet Arrangements [Abstract]3false0us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse0019. Off-Balance Sheet Arrangements In October 2005, the Company entered into a forward sale agreement under which it agreed to sell approximately 6.7 million of its common shares to an affiliate of Citigroup Global Markets Inc., which affiliate is referred to as the forward counterparty. Under the forward sale agreement, the Company would deliver common shares to the forward counterparty on one or more settlement dates chosen by the Company prior to October 2008. On July 31, 2008, the Company amended its existing forward sale agreement. Under the terms of the amendment, half the contract matured according to its original term beginning on September 26, 2008, while the remaining half was extended to April 2010. Under the terms of the unamended half of the forward sale agreement, in 2008 the Company delivered 3.4 million common shares to the forward counterparty for total proceeds of $211.6 million (see Note 12). On April 28, 2010, under the terms of the amendment to the forward sale agreement with the forward counterparty, the remaining $200 million forward sale agreement matured. Subsequent to maturity and commencing on April 28, 2010, there was a 40 day valuation period, whereby the Company could deliver up to 3.4 million common shares over the valuation period, subject to a minimum price per share of $59.05 and a maximum price per share of $84.15. As a result of the Company's share price trading between the minimum and the maximum price per share during the valuation period, the Company did not deliver any common shares to the forward counterparty (see Note 12). Under the terms of the extended forward sale agreement, contract fees of approximately $8.1 million were recorded against additional paid-in capital in 2008 and were paid over the contract period.This transaction had no other impact on the Company's common shareholders' equity, and the Company calculated the dilutive impact related to the forward sale agreement, if any, using the treasury stock method. The diluted net income per share for the years ended December 31, 2010, 2009 and 2008 did not include any dilutive effect related to this agreement.19. Off-Balance Sheet Arrangements In October 2005, the Company entered into a forward sale agreement under which it agreed to sell approximatelyfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis item represents the complete disclosure regarding the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined) which is not recognized as liabilities in the financial statements (off-balance-sheet) because they fail to meet some other criterion for recognition.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 7 -Subparagraph a Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph a Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 3 -Subparagraph a Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 7, 10 falsefalseOff Balance Sheet Arrangements12Off-Balance Sheet ArrangementsUnKnownUnKnownUnKnownUnKnownfalsetrue