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Equity (Tables) | 3 Months Ended
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Mar. 31, 2015
Stockholders' Equity Note [Abstract] |
Summary of changes in equity | The following summarizes the changes in equity for the three months ended March 31, 2015 (dollars in thousands):
| Common stock |  | Additional paid-in capital |  | Accumulated earnings less dividends |  | Accumulated other comprehensive loss |  | Total equity
Balance at December 31, 2014 | $ | 1,320 |  |  | $ | 9,354,685 |  |  | $ | (267,085 | ) |  | $ | (42,515 | ) |  | $ | 9,046,405 |
Net income attributable to common stockholders | — |  |  | — |  |  | 208,144 |  |  | — |  |  | 208,144 |
Cash flow hedge loss reclassified to earnings | — |  |  | — |  |  | — |  |  | 1,565 |  |  | 1,565 |
Change in redemption value of redeemable noncontrolling interest | — |  |  | — |  |  | 2,065 |  |  | — |  |  | 2,065 |
Dividends declared to common stockholders | — |  |  | — |  |  | (165,215 | ) |  | — |  |  | (165,215 | )
Issuance of common stock, net of withholdings | 2 |  |  | (2,268 | ) |  | (1,239 | ) |  | — |  |  | (3,505 | )
Amortization of deferred compensation | — |  |  | 8,053 |  |  | — |  |  | — |  |  | 8,053 |
Balance at March 31, 2015 | $ | 1,322 |  |  | $ | 9,360,470 |  |  | $ | (223,330 | ) |  | $ | (40,950 | ) |  | $ | 9,097,512 |

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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