| Schedule of Outstanding Senior Notes Issuances |
The following table details the Company's Senior Notes issuances as of September 30, 2017 and December 31, 2016: | | | | | | | | | | | | | | | | | | September 30, 2017 | | 2016 Senior Notes | | 2013 Senior Notes | | 2012 Senior Notes | | Total | Principal amount | | $ | 110,000 |
| | $ | 152,500 |
| | $ | — |
| | $ | 262,500 |
| Less: unamortized issuance costs | | 3,664 |
| | 4,406 |
| | — |
| | 8,070 |
| Carrying value | | $ | 106,336 |
| | $ | 148,094 |
| | $ | — |
| | $ | 254,430 |
| | | | | | | | | | December 31, 2016 | | 2016 Senior Notes | | 2013 Senior Notes | | 2012 Senior Notes | | Total | Principal amount | | $ | 110,000 |
| | $ | 152,500 |
| | $ | 100,000 |
| | $ | 362,500 |
| Less: unamortized issuance costs | | 3,694 |
| | 4,532 |
| | 2,865 |
| | 11,091 |
| Carrying value | | $ | 106,306 |
| | $ | 147,968 |
| | $ | 97,135 |
| | $ | 351,409 |
| | | | | | | | | | | | | | | | | | | Other details: | | | | | | | | | Original debt issuance costs | | $ | 3,715 |
| | $ | 5,054 |
| | $ | 3,406 |
| | | Maturity date | | June 14, 2046 |
| | Dec 1, 2043 |
| | Mar 27, 2042 |
| | | Earliest redeemable date (for cash) | | June 14, 2021 |
| | Dec 1, 2018 |
| | Mar 27, 2017 |
| | | Coupon rate | | 6.625 | % | | 7.75 | % | | 8.00 | % | | | Effective interest rate | | 7.07 | % | | 8.04 | % | | 8.31 | % | | |
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