| Summary of Loan Portfolio |
The following table shows the Company's loan portfolio by category as of the dates shown:
| | | | | | | | | | (Dollars in thousands) | | December 31, 2017 | | December 31, 2016 | Balance: | | | | | Commercial | | $ | 6,787,677 |
| | $ | 6,005,422 |
| Commercial real estate | | 6,580,618 |
| | 6,196,087 |
| Home equity | | 663,045 |
| | 725,793 |
| Residential real estate | | 832,120 |
| | 705,221 |
| Premium finance receivables—commercial | | 2,634,565 |
| | 2,478,581 |
| Premium finance receivables—life insurance | | 4,035,059 |
| | 3,470,027 |
| Consumer and other | | 107,713 |
| | 122,041 |
| Total loans, net of unearned income, excluding covered loans | | $ | 21,640,797 |
| | $ | 19,703,172 |
| Covered loans | | — |
| | 58,145 |
| Total loans, net of unearned income | | $ | 21,640,797 |
| | $ | 19,761,317 |
| Mix: | | | | | Commercial | | 31 | % | | 30 | % | Commercial real estate | | 30 |
| | 31 |
| Home equity | | 3 |
| | 4 |
| Residential real estate | | 4 |
| | 4 |
| Premium finance receivables—commercial | | 12 |
| | 12 |
| Premium finance receivables—life insurance | | 19 |
| | 18 |
| Consumer and other | | 1 |
| | 1 |
| Total loans, net of unearned income, excluding covered loans | | 100 | % | | 100 | % | Covered loans | | — |
| | — |
| Total loans, net of unearned income | | 100 | % | | 100 | % |
|
| Unpaid Principal Balance and Carrying Value of Acquired Loans |
The following table presents the unpaid principal balance and carrying value for these acquired loans as of the dates shown:
| | | | | | | | | | | | | | | | | | | | December 31, 2017 | | December 31, 2016 | (Dollars in thousands) | | Unpaid Principal Balance | | Carrying Value | | Unpaid Principal Balance | | Carrying Value | PCI loans | | $ | 375,237 |
| | $ | 350,690 |
| | $ | 509,446 |
| | $ | 471,786 |
|
|
| Activity Related to Accretable Yield of Loans Acquired with Evidence of Credit Quality Deterioration Since Origination |
The following table provides activity for the accretable yield of PCI loans.
| | | | | | | | | | | | Years Ended December 31, | (Dollars in thousands) | | 2017 | | 2016 | Accretable yield, beginning balance | | $ | 49,408 |
| | $ | 63,902 |
| Acquisitions | | 426 |
| | 2,462 |
| Accretable yield amortized to interest income | | (21,512 | ) | | (23,218 | ) | Accretable yield amortized to indemnification asset/liability (1) | | (1,087 | ) | | (5,746 | ) | Reclassification from non-accretable difference (2) | | 7,805 |
| | 13,733 |
| Increases (Decreases) in interest cash flows due to payments and changes in interest rates | | 1,525 |
| | (1,725 | ) | Accretable yield, ending balance | | $ | 36,565 |
| | $ | 49,408 |
|
| | (1) | Represents the portion of the current period accreted yield, resulting from lower expected losses, applied to reduce the loss share indemnification asset or increase the loss share indemnification liability. |
| | (2) | Reclassification is the result of subsequent increases in expected principal cash flows. |
|