| Fair value hierarchy of financial assets and financial liabilities measured on a recurring basis |
At March 31, 2014 and December 31, 2013, we classified our financial instruments measured at fair value on a recurring basis in the following valuation hierarchy: | | | | | | | | | | | | | | | | | | March 31, 2014 | | Quoted Prices in Active Markets for Identical Assets (Level 1) | | Significant Other Observable Inputs (Level 2) | | Significant Unobservable Inputs (Level 3) | | Total Fair Value | Fixed maturities | | | | | | | | | U.S. treasury bonds | | $ | 17,135 |
| | $ | — |
| | $ | — |
| | $ | 17,135 |
| U.S. agency bonds – mortgage-backed | | — |
| | 1,235,470 |
| | — |
| | 1,235,470 |
| U.S. agency bonds – other | | — |
| | 8,196 |
| | — |
| | 8,196 |
| Non-U.S. government bonds | | — |
| | 73,965 |
| | — |
| | 73,965 |
| Other mortgage-backed securities | | — |
| | 44,368 |
| | — |
| | 44,368 |
| Corporate bonds | | — |
| | 1,725,768 |
| | — |
| | 1,725,768 |
| Municipal bonds – other | | — |
| | 63,917 |
| | — |
| | 63,917 |
| Other investments | | — |
| | — |
| | 5,773 |
| | 5,773 |
| Total | | $ | 17,135 |
| | $ | 3,151,684 |
| | $ | 5,773 |
| | $ | 3,174,592 |
| As a percentage of total assets | | 0.4 | % | | 64.7 | % | | 0.1 | % | | 65.2 | % |
| | | | | | | | | | | | | | | | | | December 31, 2013 | | Quoted Prices in Active Markets for Identical Assets (Level 1) | | Significant Other Observable Inputs (Level 2) | | Significant Unobservable Inputs (Level 3) | | Total Fair Value | Fixed maturities | | | | | | | | | U.S. treasury bonds | | $ | 17,209 |
| | $ | — |
| | $ | — |
| | $ | 17,209 |
| U.S. agency bonds – mortgage-backed | | — |
| | 1,262,655 |
| | — |
| | 1,262,655 |
| U.S. agency bonds – other | | — |
| | 8,108 |
| | — |
| | 8,108 |
| Non-U.S. government bonds | | — |
| | 73,212 |
| | — |
| | 73,212 |
| Other mortgage-backed securities | | — |
| | 33,444 |
| | — |
| | 33,444 |
| Corporate bonds | | — |
| | 1,606,700 |
| | — |
| | 1,606,700 |
| Municipal bonds – auction rate | | — |
| | 99,170 |
| | — |
| | 99,170 |
| Municipal bonds – other | | — |
| | 61,569 |
| | — |
| | 61,569 |
| Other investments | | — |
| | — |
| | 5,092 |
| | 5,092 |
| Total | | $ | 17,209 |
| | $ | 3,144,858 |
| | $ | 5,092 |
| | $ | 3,167,159 |
| As a percentage of total assets | | 0.4 | % | | 66.7 | % | | 0.1 | % | | 67.2 | % |
|
| Changes in Level 3 for financial instruments measured at fair value on a recurring basis |
The following table presents changes in Level 3 for our financial instruments measured at fair value on a recurring basis for the three months ended March 31, 2014 and 2013: | | | | | | | | | | | | For the Three Months Ended | Other investments: | | March 31, 2014 |
| March 31, 2013 | Balance at beginning of period | | $ | 5,092 |
| | $ | 2,901 |
| Total realized gains – included in net realized gains on investment | | 87 |
| | 171 |
| Total realized losses – included in net realized gains on investment | | — |
| | — |
| Change in total unrealized gains – included in other comprehensive income (loss) | | 120 |
| | — |
| Change in total unrealized losses – included in other comprehensive income (loss) | | — |
| | (69 | ) | Purchases | | 787 |
| | 290 |
| Sales and redemptions | | (313 | ) | | (73 | ) | Transfers into Level 3 | | — |
| | — |
| Transfers out of Level 3 | | — |
| | — |
| Balance at end of period | | $ | 5,773 |
| | $ | 3,220 |
| Level 3 gains (losses) included in net income attributable to the change in unrealized gains (losses) relating to assets held at the reporting date | | $ | — |
| | $ | — |
|
|
| Carrying values and fair values of the Senior Notes and Junior Subordinated debt |
The following table presents the carrying values and fair values of the Senior Notes and Junior Subordinated debt as of March 31, 2014 and December 31, 2013: | | | | | | | | | | | | | | | | | | | | | | | | | March 31, 2014 | | December 31, 2013 | | | Interest Rate | | Carrying Value | | Fair Value | | Carrying Value | | Fair Value | 2011 Senior Notes | | 8.25 | % | | $ | 107,500 |
| | $ | 111,585 |
| | $ | 107,500 |
| | $ | 101,480 |
| 2012 Senior Notes | | 8.00 | % | | 100,000 |
| | 104,200 |
| | 100,000 |
| | 89,760 |
| 2013 Senior Notes | | 7.75 | % | | 152,500 |
| | 152,439 |
| | 152,500 |
| | 126,209 |
| Junior Subordinated Debt | | 14.00 | % | | — |
| | — |
| | 126,381 |
| | 152,500 |
|
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