| Fair value hierarchy of financial assets and financial liabilities measured on a recurring basis |
At June 30, 2021 and December 31, 2020, the Company classified financial instruments measured at fair value on a recurring basis in the following valuation hierarchy: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | June 30, 2021 | | Quoted Prices in Active Markets for Identical Assets (Level 1) | | Significant Other Observable Inputs (Level 2) | | Significant Unobservable Inputs (Level 3) | | Fair Value Based on NAV Practical Expedient | | Total Fair Value | Fixed maturities | | | | | | | | | | | | U.S. treasury bonds | | $ | 78,454 | | | $ | — | | | $ | — | | | $ | — | | | $ | 78,454 | | | U.S. agency bonds – mortgage-backed | | — | | | 153,453 | | | — | | | — | | | 153,453 | | | | | | | | | | | | | | Non-U.S. government bonds | | — | | | 3,440 | | | — | | | — | | | 3,440 | | | Asset-backed securities | | — | | | 195,292 | | | — | | | — | | | 195,292 | | | Corporate bonds | | — | | | 508,046 | | | — | | | — | | | 508,046 | | | | | | | | | | | | | | Equity investments | | 4,905 | | | — | | | — | | | — | | | 4,905 | | Other investments | | — | | | — | | | 29,344 | | | 22,408 | | | 51,752 | | Total | | $ | 83,359 | | | $ | 860,231 | | | $ | 29,344 | | | $ | 22,408 | | | $ | 995,342 | | As a percentage of total assets | | 3.2 | % | | 33.0 | % | | 1.1 | % | | 0.9 | % | | 38.2 | % |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2020 | | Quoted Prices in Active Markets for Identical Assets (Level 1) | | Significant Other Observable Inputs (Level 2) | | Significant Unobservable Inputs (Level 3) | | Fair Value Based on NAV Practical Expedient | | Total Fair Value | Fixed maturities | | | | | | | | | | | | U.S. treasury bonds | | $ | 94,502 | | | $ | — | | | $ | — | | | $ | — | | | $ | 94,502 | | | U.S. agency bonds – mortgage-backed | | — | | | 281,437 | | | — | | | — | | | 281,437 | | | | | | | | | | | | | | Non-U.S. government bonds | | — | | | 9,708 | | | — | | | — | | | 9,708 | | | Asset-backed securities | | — | | | 185,432 | | | — | | | — | | | 185,432 | | | Corporate bonds | | — | | | 642,332 | | | — | | | — | | | 642,332 | | | | | | | | | | | | | | | | | | | | | | | | Other investments | | — | | | — | | | 26,094 | | | 4,345 | | | 30,439 | | Total | | $ | 94,502 | | | $ | 1,118,909 | | | $ | 26,094 | | | $ | 4,345 | | | $ | 1,243,850 | | As a percentage of total assets | | 3.2 | % | | 37.9 | % | | 0.9 | % | | 0.1 | % | | 42.1 | % |
|
| Significant unobservable inputs for determining fair value of other investments |
The following table provides a summary of quantitative information regarding the significant unobservable inputs used in determining the fair value of other investments measured at fair value on a recurring basis under the Level 3 classification at June 30, 2021: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fair Value | | Valuation Technique | | Unobservable Inputs | | Range | | Private equity investments | | $ | 27,544 | | | Quarterly financial statements | | Estimated maturity dates | | 1.0 years | to | 3.0 years | | Other including start-ups | | 1,800 | | | Recent market transactions | | Liquidity discount rates | | | | | | Total Level 3 investments | | $ | 29,344 | | | | | | | | | |
|
| Reconciliation of other investments measured at fair value on a recurring basis using Level 3 inputs |
The following table shows the reconciliation of the beginning and ending balances for other investments measured at fair value on a recurring basis using Level 3 inputs for the three and six months ended June 30, 2021 and 2020. The Company includes any related interest and dividend income in net investment income and thus are excluded from the reconciliation in the table below: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For the Three Months Ended June 30, | | For the Six Months Ended June 30, | | | | 2021 | | 2020 | | 2021 | | 2020 | | Balance - beginning of period | | $ | 29,344 | | | $ | 1,800 | | | $ | 26,094 | | | $ | 1,800 | | | | | | | | | | | | | | | | | | | | | Purchases | | — | | | 1,000 | | | 4,250 | | | 1,000 | | | Transfers out of Level 3 | | — | | | — | | | (1,000) | | | — | | | Total Level 3 investments - end of period | | $ | 29,344 | | | $ | 2,800 | | | $ | 29,344 | | | $ | 2,800 | |
|
| Carrying values and fair values of financial instruments not measured at fair value |
The following table presents the respective carrying value and fair value for the Senior Notes as at June 30, 2021 and December 31, 2020: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | June 30, 2021 | | December 31, 2020 | | | Carrying Value | | Fair Value | | Carrying Value | | Fair Value | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Senior Notes - MHLA – 6.625% | | $ | 110,000 | | | $ | 96,976 | | | $ | 110,000 | | | $ | 90,772 | | Senior Notes - MHNC – 7.75% | | 152,500 | | | 147,925 | | | 152,500 | | | 132,126 | | | Total Senior Notes | | $ | 262,500 | | | $ | 244,901 | | | $ | 262,500 | | | $ | 222,898 | |
|