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Loans Held for Sale, at Fair Value (Tables) | 6 Months Ended
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Jun. 30, 2019
Loans Receivable Held For Sale Net [Abstract] |
Summary of Loans Held for Sale at Cost Basis and Fair Value | Loans held for sale had a cost basis and fair value as follows (in thousands):
|  | Cost Basis |  |  | Fair Value |
June 30, 2019 |  | $ | 793,212 |  |  | $ | 818,909 |
December 31, 2018 |  |  | 972,434 |  |  |  | 990,864 |

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