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Restricted Cash (Tables) | 12 Months Ended
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Dec. 31, 2018
Restricted Cash And Investments [Abstract] |
Restricted Cash Components and Its Secured Investments |
| December 31,
| 2018 |  | 2017
| (In thousands)
Cash pledged as collateral to other financial institutions to secure: |  |  |  |  |
Derivatives | $ | 1,980 |  | $ | 1,980
Obligations under agreement of loans sold with recourse |  | 1,050 |  |  | 1,050
| $ | 3,030 |  | $ | 3,030

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