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v3.19.1

Borrowings - SBI Bonds (Details) $ in Thousands | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2019 USD ($) | Mar. 31, 2018 USD ($) | Mar. 31, 2019 JPY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 JPY (¥) | Jul. 25, 2016 USD ($) | Jul. 25, 2016 JPY (¥)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Outstanding principal amount | $ 2,031,571 |  |  |  |  |  |
SBI Bonds |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Outstanding principal amount | 31,571 |  |  | $ 31,908 |  |  |
VFH | SBI Bonds |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Face amount |  |  |  |  |  | $ 33,100 | ¥ 3,500,000,000.0
Outstanding principal amount | 31,600 |  | ¥ 3,500,000,000 | $ 31,900 | ¥ 3,500,000,000 |  |
Loss due to change in currency rates | $ 400 | $ 1,900 |  |  |  |  |

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