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Borrowings (Tables) | 12 Months Ended
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Dec. 31, 2017
Federal Home Loan Banks [Abstract] |
FHLB Advances | Borrowings consisted of the following:
| As of December 31,
| 2017 |  | 2016
| (In thousands)
FHLB advances | $ | 150,000 |  |  | $ | 315,000 |
Total FHLB advances | $ | 150,000 |  |  | $ | 315,000 |
Summary of Contractual Maturities Pertaining to FHLB | FHLB advances represent collateralized obligations with the FHLB. The following is a summary of contractual maturities pertaining to FHLB advances:
Year of Maturity | Amount |  | Weighted- Average Interest Rate
| (In thousands)
2018 | $ | 150,000 |  |  | 1.41 | %
Total | $ | 150,000 |  |  | 1.41 | %
Summary of Financial Data Pertaining to Federal Home Loan Bank Advances | The following is financial data pertaining to overnight FHLB advances:
| As of December 31,
| 2017 |  | 2016 |  | 2015
| (In thousands)
Weighted-average interest rate at end of year | 1.41 | % |  | 0.55 | % |  | 0.27 | %
Weighted-average interest rate during the year | 0.90 | % |  | 0.45 | % |  | 0.20 | %
Average balance of FHLB advances | $ | 119,041 |  |  | $ | 196,708 |  |  | $ | 38,110 |
Maximum amount outstanding at any month-end | $ | 330,000 |  |  | $ | 320,000 |  |  | $ | 180,000 |

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