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Net Income (Loss) per Share - Basic and Diluted Net Income per Share of Common Stock Using Two-Class Method (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Numerator: |  |
Net income | $ 49,433 | $ 47,125
Preferred dividends | (6,835) | (9,310)
Net income available to common stockholders | 42,598 | 37,815
Dividends declared on common stock | (56,577) | (42,146)
Dividends on participating securities | (751) | (630)
Net loss attributable to common stockholders | $ (14,730) | $ (4,961)
Denominator: |  |
Basic weighted average shares of common stock outstanding (in shares) | 110,211,853 | 91,612,447
Diluted weighted average shares of common stock outstanding (in shares) | 111,871,429 | 92,998,250
Net income per weighted average share of common stock |  |
Distributable Earnings per share of common stock (in dollars per share) | $ 0.51 | $ 0.46
Undistributed loss per share of common stock (in dollars per share) | (0.13) | (0.05)
Net income per share of common stock (in dollars per share) | $ 0.38 | $ 0.41

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- Definition Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
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- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References No definition available. + Details
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