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COMMITMENTS, CONTINGENCIES AND DERIVATIVES (Tables) | 6 Months Ended
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Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract] |
Summary of Contractual and Notional Amounts of Financial Instruments | The following is a summary of the contractual and notional amounts of the Company’s financial instruments:
| June 30, 2018 |  | December 31, 2017
Lending-Related Instruments: |  |  |  |  |
Loan origination commitments and unadvanced lines of credit: |  |  |  |  |
Home equity | $ | 499,559 |  |  | $ | 477,401 |
Residential | 47,554 |  |  | 41,368 |
Commercial and commercial real estate | 35,205 |  |  | 49,482 |
Letters of credit | 3,009 |  |  | 2,848 |
Other commitments | 2,327 |  |  | 523 |
Derivative Financial Instruments: |  |  |  |
Customer loan swaps | $ | 728,226 |  |  | $ | 703,336 |
Junior subordinated debt interest rate swaps | 43,000 |  |  | 43,000 |
Interest rate lock commitments | 27,736 |  |  | 21,746 |
FHLBB advance interest rate swaps | 25,000 |  |  | 50,000 |
Forward delivery commitments | 12,585 |  |  | 8,065 |
Summary of Derivative Financial Instruments | The Company's pipeline of mortgage loans with fixed-rate interest rate lock commitments for which the Company intends to sell the loan upon origination were as follows for the periods indicated:
|  |  |  | June 30, 2018 |  | December 31, 2017
|  | Balance Sheet Location |  | Notional |  | Fair Value |  | Notional |  | Fair Value
Fixed-rate mortgage interest rate locks |  | Other Assets |  | $ | 21,956 |  |  | $ | 331 |  |  | $ | 19,886 |  |  | $ | 307 |
Fixed-rate mortgage interest rate locks |  | Accrued interest and other liabilities |  | 5,780 |  |  | (54 | ) |  | 1,860 |  |  | (22 | )
Total |  |  |  | $ | 27,736 |  |  | $ | 277 |  |  | $ | 21,746 |  |  | $ | 285 |
The details of the FHLBB advance interest rate swaps for the periods indicated were as follows:
|  |  |  |  |  |  |  |  |  | June 30, 2018 |  | December 31, 2017
Notional Amount |  | Trade Date |  | Maturity Date |  | Variable Index Received |  | Fixed Rate Paid |  | Fair Value(1) |  | Fair Value(1)
$ | 25,000 |  |  | 2/25/2015 |  | 2/25/2018 |  | 1-Month USD LIBOR |  | 1.54% |  | $ | — |  |  | $ | 20 |
25,000 |  |  | 2/25/2015 |  | 2/25/2019 |  | 1-Month USD LIBOR |  | 1.74% |  | 89 |  |  | 1 |
|  |  |  |  |  |  |  |  |  |  | $ | 89 |  |  | $ | 21 |
(1) | Presented within other assets on the consolidated statements of condition.
The details of the junior subordinated debt interest rate swaps for the periods indicated were as follows:
|  |  |  |  |  |  |  |  |  | June 30, 2018 |  | December 31, 2017
Notional Amount |  | Trade Date |  | Maturity Date |  | Variable Index Received |  | Fixed Rate Paid |  | Fair Value(1) |  | Fair Value(1)
$ | 10,000 |  |  | 3/18/2009 |  | 6/30/2021 |  | 3-Month USD LIBOR |  | 5.09% |  | $ | 259 |  |  | $ | 527 |
10,000 |  |  | 7/8/2009 |  | 6/30/2029 |  | 3-Month USD LIBOR |  | 5.84% |  | 1,507 |  |  | 2,133 |
10,000 |  |  | 5/6/2010 |  | 6/30/2030 |  | 3-Month USD LIBOR |  | 5.71% |  | 1,478 |  |  | 2,129 |
5,000 |  |  | 3/14/2011 |  | 3/30/2031 |  | 3-Month USD LIBOR |  | 4.35% |  | 798 |  |  | 1,137 |
8,000 |  |  | 5/4/2011 |  | 7/7/2031 |  | 3-Month USD LIBOR |  | 4.14% |  | 1,109 |  |  | 1,645 |
$ | 43,000 |  |  |  |  |  |  |  |  |  |  | $ | 5,151 |  |  | $ | 7,571 |
(1) | Presented within accrued interest and other liabilities on the consolidated statements of condition.
The following table presents the total positions, notional and fair value of the Company's customer loans swaps with its commercial customers and the corresponding interest rate swap agreements with counterparty for the periods indicated:
|  |  |  | June 30, 2018 |  | December 31, 2017
|  | Balance Sheet Location |  | Number of Positions |  | Notional |  | Fair Value |  | Number of Positions |  | Notional |  | Fair Value
Receive fixed, pay variable |  | Other assets / (accrued interest and other liabilities) |  | 63 |  |  | $ | 331,966 |  |  | $ | (13,250 | ) |  | 42 |  |  | $ | 226,884 |  |  | $ | (5,036 | )
Receive fixed, pay variable |  | Other assets / (accrued interest and other liabilities) |  | 11 |  |  | 32,147 |  |  | 390 |  |  | 23 |  |  | 124,784 |  |  | 1,799 |
Pay fixed, receive variable |  | Other assets / (accrued interest and other liabilities) |  | 74 |  |  | 364,113 |  |  | 12,860 |  |  | 65 |  |  | 351,668 |  |  | 3,237 |
Total |  |  |  | 148 |  |  | $ | 728,226 |  |  | $ | — |  |  | 130 |  |  | $ | 703,336 |  |  | $ | — |
Forward Delivery Commitments | The Company's forward delivery commitments on loans held for sale was as follows for the periods indicated:
|  |  |  | June 30, 2018 |  | December 31, 2017
|  | Balance Sheet Location |  | Notional |  | Fair Value |  | Notional |  | Fair Value
Forward delivery commitments ("best effort") |  | Other Assets |  | $ | 10,929 |  |  | $ | 212 |  |  | $ | 6,692 |  |  | $ | 158 |
Forward delivery commitments ("best effort") |  | Accrued interest and other liabilities |  | 1,656 |  |  | (20 | ) |  | 1,373 |  |  | (16 | )
Total |  |  |  | $ | 12,585 |  |  | $ | 192 |  |  | $ | 8,065 |  |  | $ | 142 |
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) | The table below presents the effect of the Company’s derivative financial instruments included in OCI and current earnings for the periods indicated:
|  | For The Three Months Ended June 30 |  | For The Six Months Ended June 30,
|  | 2018 |  | 2017 |  | 2018 |  | 2017
Derivatives designated as cash flow hedges: |  |  |  |  |  |  |  |
Effective portion of unrealized gains (losses) recognized within OCI during the period, net of tax |  | $ | 414 |  |  | $ | (462 | ) |  | $ | 1,570 |  |  | $ | (372 | )
Net reclassification adjustment for effective portion of cash flow hedges included in interest expense, gross(1) |  | $ | 203 |  |  | $ | 413 |  |  | $ | 487 |  |  | $ | 868 |
(1) Reclassified into the consolidated statements of income within interest expense.

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