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DERIVATIVE INSTRUMENTS | 12 Months Ended
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Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
DERIVATIVE INSTRUMENTS | The following table summarizes the balance sheet classification of derivatives recorded at fair value. The notional amount of derivative contracts represents the basis upon which pay or receive amounts are calculated and is presented in the table to quantify the volume of our derivative activities. Notional amounts are not reflective of credit risk. None of our derivative instruments are designated as hedges under current accounting guidance.
|  | At December 31, 2016 |  | At December 31, 2015 |
|  | Derivative Notional Amount |  | Asset Derivative Fair Value(1) |  | Liability Derivative Fair Value(1) |  | Derivative Notional Amount |  | Asset Derivative Fair Value(1) |  | Liability Derivative Fair Value(1) |
| Relating to investment portfolio: |  |  |  |  |  |  |  |  |  |  |  |
| Foreign exchange forward contracts | $ | 195,979 |  |  | $ | 12,331 |  |  | $ | 87 |  |  | $ | 198,406 |  |  | $ | 490 |  |  | $ | 837 |  |
| Interest rate swaps | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |
| Relating to underwriting portfolio: |  |  |  |  |  |  |  |  |  |  |  |
| Foreign exchange forward contracts | 492,899 |  |  | 2,034 |  |  | 8,989 |  |  | 692,023 |  |  | 1,582 |  |  | 6,855 |  |
| Weather-related contracts | 67,957 |  |  | 2,532 |  |  | 6,500 |  |  | 51,395 |  |  | 4,395 |  |  | 10,937 |  |
| Commodity contracts | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |
| Total derivatives |  |  | $ | 16,897 |  |  | $ | 15,576 |  |  |  |  | $ | 6,467 |  |  | $ | 18,629 |  |
(1) | Asset and liability derivatives are classified within other assets and other liabilities on the Consolidated Balance Sheets.
Offsetting Assets and Liabilities Our derivative instruments are generally traded under International Swaps and Derivatives Association master netting agreements, which establish terms that apply to all transactions. In the event of a bankruptcy or other stipulated event, master netting agreements provide that individual positions be replaced with a new amount, usually referred to as the termination amount, determined by taking into account market prices and converting into a single currency. Effectively, this contractual close-out netting reduces credit exposure from gross to net exposure. The table below presents a reconciliation of our gross derivative assets and liabilities to the net amounts presented in our Consolidated Balance Sheets, with the difference being attributable to the impact of master netting agreements.
|  | December 31, 2016 |  | December 31, 2015 |
|  | Gross Amounts | Gross Amounts Offset | Net Amounts(1) |  | Gross Amounts | Gross Amounts Offset | Net Amounts(1) |
| Derivative assets | $ | 22,270 |  | $ | (5,373 | ) | $ | 16,897 |  |  | $ | 14,336 |  | $ | (7,869 | ) | $ | 6,467 |  |
| Derivative liabilities | $ | 20,949 |  | $ | (5,373 | ) | $ | 15,576 |  |  | $ | 26,498 |  | $ | (7,869 | ) | $ | 18,629 |  |
(1) | Net asset and liability derivatives are classified within other assets and other liabilities on the Consolidated Balance Sheets.
Refer to Note 5 'Investments' for information on reverse repurchase agreements. a) Relating to Investment Portfolio Foreign Currency Risk Within our investment portfolio we are exposed to foreign currency risk. Accordingly, the fair values for our investment portfolio are partially influenced by the change in foreign exchange rates. We may enter into foreign currency forward contracts to manage the effect of this foreign currency risk. These foreign currency hedging activities are not designated as specific hedges for financial reporting purposes. Interest Rate Risk Our investment portfolio contains a large percentage of fixed maturities which exposes us to significant interest rate risk. As part of our overall management of this risk, we may use interest rate swaps. b) Relating to Underwriting Portfolio Foreign Currency Risk Our (re)insurance subsidiaries and branches operate in various foreign countries. Consequently, some of our business is written in currencies other than the U.S. dollar and, therefore, our underwriting portfolio is exposed to significant foreign currency risk. We manage foreign currency risk by seeking to match our foreign-denominated net liabilities under (re)insurance contracts with cash and investments that are denominated in such currencies. We may also use derivative instruments, specifically forward contracts and currency options, to economically hedge foreign currency exposures. Weather Risk We write derivative-based risk management products designed to address weather risks with the objective of generating profits on a portfolio basis. The majority of this business consists of receiving a payment at contract inception in exchange for bearing the risk of variations in a quantifiable weather-related phenomenon, such as temperature. Where a client wishes to minimize the upfront payment, these transactions may be structured as swaps or collars. In general, our portfolio of such derivative contracts is of short duration, with contracts being predominantly seasonal in nature. In order to economically hedge a portion of this portfolio, we may also purchase weather derivatives. Commodity Risk Within our (re)insurance portfolio we are exposed to commodity price risk. We may hedge a portion of this price risk by entering into commodity derivative contracts. The total unrealized and realized gains (losses) recognized in earnings for derivatives not designated as hedges were as follows:
|  | Location of Gain (Loss) Recognized in Income on Derivative | Amount of Gain (Loss) Recognized in Income on Derivative |
|  | 2016 |  | 2015 |  | 2014 |
| Relating to investment portfolio: |  |  |  |  |  |  |
| Foreign exchange forward contracts | Net realized investment gains (losses) | $ | 10,929 |  |  | $ | 11,265 |  |  | $ | 10,333 |  |
| Interest rate swaps | Net realized investment gains (losses) | — |  |  | (4,006 | ) |  | (19,936 | ) |
| Relating to underwriting portfolio: |  |  |  |  |  |  |
| Foreign exchange forward contracts | Foreign exchange gains (losses) | (8,179 | ) |  | (25,412 | ) |  | (10,363 | ) |
| Weather-related contracts | Other insurance related income (loss) | 4,910 |  |  | (3,005 | ) |  | (5,373 | ) |
| Commodity contracts | Other insurance related income (loss) | (2,382 | ) |  | (1,814 | ) |  | 8,328 |  |
| Total |  | $ | 5,278 |  |  | $ | (22,972 | ) |  | $ | (17,011 | ) |

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