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Other expenses (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Other Income and Expenses [Abstract] |  |  |  |
Deposit liabilities and reinsurance contracts investment expense | $ 2,871 | $ 1,146 | $ 4,352 | $ 2,365
Change in fair value of embedded derivatives in deposit and reinsurance contracts (1) | 111 | 100 | 437 | 310
Other expenses | $ 2,982 | $ 1,246 | $ 4,789 | $ 2,675

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