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Capital Stock | 12 Months Ended
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Dec. 31, 2012
Equity [Abstract] |
Capital Stock | Capital Stock In December 2012, we acquired the Funds, which own 3.7 million shares of our common stock that are reflected as treasury stock on our Consolidated Balance Sheet as of December 31, 2012. See “Note 4—Acquisitions of Real Estate Property.” In June 2012, we completed the public offering and sale of 5,980,000 shares of our common stock for $342.5 million in aggregate proceeds. On November 15, 2011, we issued an aggregate of 943,714 shares of our common stock in settlement of the conversion value in excess of the $230.0 million principal amount outstanding of our 3 7/8% convertible senior notes due 2011 upon maturity. On July 1, 2011, following approval by our stockholders, we amended our Amended and Restated Certificate of Incorporation, as previously amended (our “Charter”), to increase the number of authorized shares of our capital stock to 610,000,000, comprised of 600,000,000 shares of common stock, par value $0.25 per share, and 10,000,000 shares of preferred stock, par value $1.00 per share. On July 1, 2011, in connection with the NHP acquisition, we issued 99,849,106 shares of our common stock to NHP stockholders and holders of NHP equity awards (which shares had a total value of $5.4 billion based on the July 1, 2011 closing price of our common stock of $53.74 per share). We reserved 2,253,366 additional shares of our common stock for issuance in connection with equity awards and other convertible or exchangeable securities (specifically the OP Units) that we assumed in connection with the NHP acquisition. On May 12, 2011, as partial consideration for the ASLG acquisition, we issued to the sellers in a private placement an aggregate of 24,958,543 shares of our common stock (which shares had a total value of $1.38 billion based on the May 12, 2011 closing price of our common stock of $55.33 per share). On November 2, 2011, we cancelled 83,441 shares issued to the sellers for a working capital adjustment in accordance with the purchase agreement. In February 2011, we completed the public offering and sale of 5,563,000 shares of our common stock for $300.0 million in aggregate proceeds. Excess Share Provision In order to preserve our ability to maintain REIT status, our Charter provides that if a person acquires beneficial ownership of more than 9% of our outstanding common stock or 9.9% of our outstanding preferred stock, the shares that are beneficially owned in excess of such limit are deemed to be excess shares. These shares are automatically deemed transferred to a trust for the benefit of a charitable institution or other qualifying organization selected by our Board of Directors. The trust is entitled to all dividends with respect to the shares and the trustee may exercise all voting power over the shares. We have the right to buy the excess shares for a purchase price equal to the lesser of the price per share in the transaction that created the excess shares or the market price on the date we buy the shares, and we may defer payment of the purchase price for the excess shares for up to five years. If we do not purchase the excess shares, the trustee of the trust is required to transfer the excess shares at the direction of the Board of Directors. The owner of the excess shares is entitled to receive the lesser of the proceeds from the sale or the original purchase price for such excess shares, and any additional amounts are payable to the beneficiary of the trust. Our Board of Directors is empowered to grant waivers from the excess share provisions of our Charter. Distribution Reinvestment and Stock Purchase Plan Under our Distribution Reinvestment and Stock Purchase Plan (“DRIP”), existing stockholders may purchase shares of common stock by reinvesting all or a portion of the cash distribution on their shares of our common stock, subject to certain limits. Existing stockholders and new investors also may purchase shares of our common stock under the DRIP by making optional cash payments, subject to certain limits. We currently offer a 1% discount on the purchase price of our common stock to shareholders who reinvest their dividends or make optional cash purchases through the DRIP. The amount and availability of this discount is at our discretion. The granting of a discount for one month or quarter, as applicable, will not insure the availability or amount of a discount in future periods, and each month or quarter, as applicable, we may lower or eliminate the discount without prior notice. We may also, without prior notice, change our determination as to whether common shares will be purchased by the plan administrator directly from us or in the open market. Accumulated Other Comprehensive Income The following is a summary of our accumulated other comprehensive income as of December 31, 2012 and 2011:
| 2012 |  | 2011
| (In thousands)
Foreign currency translation | $ | 23,441 |  |  | $ | 21,066 |
Unrealized gain on marketable debt securities | 807 |  |  | 2,103 |
Other | (894 | ) |  | (1,107 | )
Total accumulated other comprehensive income | $ | 23,354 |  |  | $ | 22,062 |

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- Definition The entire disclosure for shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Preferred Stock -URI http://asc.fasb.org/extlink&oid=6521494 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB TOPIC 4.C) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187143-122770 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section B -Paragraph 7, 11A -Chapter 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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