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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred financing costs | $ 12,993 | $ 17,190
Deferred financing costs | $ 20,100 | $ 24,500
Preferred stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Preferred stock, shares authorized (in shares) | 50,000,000 | 50,000,000
Preferred stock, shares issued (in shares) | 6,770,393 | 6,770,393
Preferred stock, shares outstanding (in shares) | 6,770,393 | 6,770,393
Preferred stock, liquidation preference | $ 169,260 | $ 169,260
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, shares authorized (in shares) | 450,000,000 | 450,000,000
Common stock, shares issued (in shares) | 139,295,867 | 153,537,296
Common stock, shares outstanding (in shares) | 139,295,867 | 153,537,296
CECL allowance | $ 213,102 | $ 38,102
Loan specific reserves | 175,000 | 56,981
General CECL allowance related to unfunded commitments | 3,365 | 0
Secured Debt |  |
Deferred financing costs | 7,130 | 7,277
Commercial Mortgage Portfolio Segment |  |
Loans pledged as collateral | $ 5,418,999 | $ 4,852,087

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