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DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES (Tables) | 9 Months Ended
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Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Information About Derivative Assets and Liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2021
​ | ​ | ​ | ​ | Weighted | ​ | ​ |  | ​
​ | ​ | Notional | ​ | Average | ​ | Fair Value | ​ | Location Fair
​ | ​ | Amount | ​ | Maturity | ​ | Asset (Liability) |  | Value Asset
​ |  | (in thousands) |  | (in years) |  | (in thousands) |  | (Liability)
Cash flow hedges: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap on wholesale fundings | ​ | $ | 75,000 |  | ​ | 3.3 | ​ | $ | (1,168) | ​ | Other liabilities
Interest rate swap on variable rate loans | ​ | ​ | 50,000 | ​ | ​ | 4.5 | ​ | ​ | (121) | ​ | Other liabilities
Total cash flow hedges | ​ |  | 125,000 |  | ​ | ​ | ​ | ​ | (1,289) | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value hedges: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap on securities | ​ |  | 37,190 |  | ​ | 7.8 | ​ |  | (841) | ​ | Other liabilities
Total fair value hedges | ​ |  | 37,190 |  | ​ | ​ | ​ | ​ | (841) | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Economic hedges: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Forward sale commitments | ​ |  | 14,533 |  | ​ | 0.1 | ​ |  | (140) | ​ | Other liabilities
Customer Loan Swaps-MNA Counterparty | ​ | ​ | 250,852 | ​ | ​ | 6.4 | ​ | ​ | (10,258) | ​ | Other liabilities
Customer Loan Swaps-RPA Counterparty | ​ | ​ | 119,285 | ​ | ​ | 7.1 | ​ | ​ | (5,892) | ​ | Other liabilities
Customer Loan Swaps-Customer | ​ | ​ | 370,137 | ​ | ​ | 6.6 | ​ | ​ | 16,150 | ​ | Other assets
Total economic hedges | ​ |  | 754,807 |  | ​ | ​ | ​ | ​ | (140) | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Non-hedging derivatives: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate lock commitments | ​ |  | 12,885 |  | ​ | 0.1 | ​ |  | 47 | ​ | Other assets
Total non-hedging derivatives | ​ |  | 12,885 |  | ​ | ​ | ​ | ​ | 47 | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 929,882 | ​ | ​ | ​ | ​ | $ | (2,223) | ​ | ​
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ | ​ | ​ | ​ | Weighted | ​ | ​ |  | ​
​ | ​ | Notional | ​ | Average | ​ | Fair Value | ​ | Location Fair
​ | ​ | Amount | ​ | Maturity | ​ | Asset (Liability) |  | Value Asset
​ |  | (in thousands) |  | (in years) |  | (in thousands) |  | (Liability)
Cash flow hedges: |  | ​ |  |  | ​ |  |  | ​ |  | ​ | ​
Interest rate swap on wholesale fundings | ​ | $ | 75,000 |  | ​ | 4.0 | ​ | $ | (2,664) | ​ | Other liabilities
Total cash flow hedges | ​ |  | 75,000 |  | ​ | ​ | ​ | ​ | (2,664) | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value hedges: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap on securities(1) | ​ |  | 37,190 |  | ​ | 8.6 | ​ |  | (2,789) | ​ | Other liabilities
Total fair value hedges | ​ |  | 37,190 |  | ​ | ​ | ​ | ​ | (2,789) | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Economic hedges: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Forward sale commitments | ​ | ​ | 50,629 |  | ​ | 0.2 | ​ |  | (95) | ​ | Other liabilities
Customer Loan Swaps-MNA Counterparty | ​ | ​ | 235,947 | ​ | ​ | 6.8 | ​ | ​ | (15,938) | ​ | Other liabilities
Customer Loan Swaps-RPA Counterparty | ​ | ​ | 119,285 | ​ | ​ | 7.9 | ​ | ​ | (9,957) | ​ | Other liabilities
Customer Loan Swaps-Customer | ​ | ​ | 355,232 | ​ | ​ | 7.1 | ​ | ​ | 25,895 | ​ | Other assets
Total economic hedges | ​ |  | 761,093 |  | ​ | ​ | ​ | ​ | (95) | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Non-hedging derivatives: | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate lock commitments | ​ |  | 3,320 |  | ​ | 0.1 | ​ |  | 22 | ​ | Other assets
Total non-hedging derivatives | ​ |  | 3,320 |  | ​ | ​ | ​ | ​ | 22 | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 876,603 | ​ | ​ | ​ | ​ | $ | (5,526) | ​ | ​
(1) | Prior period has been revised, see Note 1 Basis of Presentation – Revision of Previously Issued Financial Statements.
Schedule of Amounts Recorded On The Balance Sheet | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Cumulative Amount of Fair
​ | ​ | Location of Hedged Item on | ​ | Carrying Amount of Hedged | ​ | Value Hedging Adjustment in
​ |  | Balance Sheet |  | Assets |  | Carrying Amount
September 30, 2021 |  |  |  | ​ |  |  | ​ |
Interest rate swap on securities |  | Securities Available for Sale | ​ | $ | 39,200 | ​ | $ | 2,010
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2020 |  |  | ​ |  |  | ​ |  |
Interest rate swap on securities |  | Securities Available for Sale | ​ | $ | 40,209 | ​ | $ | 3,019
​
Schedule of Derivative Instruments Gain (Loss) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, 2021
​ |  | Amount of |  | ​ |  | Amount of |  | ​ |  | ​
​ | ​ | Gain (Loss) | ​ | ​ | ​ | Gain (Loss) | ​ | ​ | ​ | ​
​ | ​ | Recognized in | ​ | ​ | ​ | Reclassified | ​ | Location of | ​ | Amount of
​ | ​ | Other | ​ | Location of Gain (Loss) | ​ | from Other | ​ | Gain (Loss) | ​ | Gain (Loss)
​ | ​ | Comprehensive | ​ | Reclassified from Other | ​ | Comprehensive | ​ | Recognized in | ​ | Recognized
(in thousands) |  | Income |  | Comprehensive Income |  | Income |  | Income |  | in Income
Cash flow hedges: |  | ​ |  |  |  |  | ​ |  |  |  |  | ​ |
Interest rate swap on wholesale funding | ​ | $ | 167 | ​ | Interest expense | ​ | $ | — |  | Interest expense | ​ | $ | (205)
Interest rate swap on variable rate loans | ​ | ​ | (101) | ​ | Interest income | ​ | ​ | — | ​ | Interest income | ​ | ​ | 92
Total cash flow hedges | ​ |  | 66 |  | ​ | ​ |  | — |  |  | ​ |  | (113)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value hedges: | ​ |  |  |  |  | ​ |  |  |  |  | ​ |  |
Interest rate swap on securities | ​ |  | (221) |  | Interest income | ​ |  | — |  | Interest income | ​ |  | (144)
Total fair value hedges | ​ |  | (221) |  | ​ | ​ |  | — |  |  | ​ |  | (144)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Economic hedges: | ​ |  |  |  |  | ​ |  |  |  |  | ​ |  |
Forward commitments | ​ |  | — |  | Other income | ​ |  | — |  | Other income | ​ |  | (96)
Total economic hedges | ​ |  | — |  | ​ | ​ |  | — |  |  | ​ |  | (96)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Non-hedging derivatives: | ​ |  |  |  |  | ​ |  |  |  |  | ​ |  |
Interest rate lock commitments | ​ |  | — |  | Other income | ​ |  | — |  | Other income | ​ |  | 22
Total non-hedging derivatives | ​ |  | — |  | ​ | ​ |  | — |  |  | ​ |  | 22
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | (155) | ​ | ​ | ​ | $ | — |  |  | ​ | $ | (331)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Nine Months Ended September 30, 2021
​ |  | Amount of |  | ​ |  | Amount of |  | ​ |  | ​
​ | ​ | Gain (Loss) | ​ | ​ | ​ | Gain (Loss) | ​ | ​ | ​ | ​
​ | ​ | Recognized in | ​ | ​ | ​ | Reclassified | ​ | Location of | ​ | Amount of
​ | ​ | Other | ​ | Location of Gain (Loss) | ​ | from Other | ​ | Gain (Loss) | ​ | Gain (Loss)
​ | ​ | Comprehensive | ​ | Reclassified from Other | ​ | Comprehensive | ​ | Recognized in | ​ | Recognized
(in thousands) |  | Income |  | Comprehensive Income |  | Income |  | Income |  | in Income
Cash flow hedges: |  | ​ |  |  |  |  | ​ |  |  |  |  | ​ |
Interest rate swap on wholesale funding | ​ | $ | 1,148 | ​ | Interest expense | ​ | $ | — |  | Interest expense | ​ | $ | (589)
Interest rate swap on variable rate loans | ​ | ​ | (93) | ​ | Interest income | ​ | ​ | — | ​ | Interest income | ​ | ​ | 189
Total cash flow hedges | ​ |  | 1,055 |  | ​ | ​ |  | — |  |  | ​ |  | (400)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value hedges: | ​ |  |  |  |  | ​ |  |  |  |  | ​ |  |
Interest rate swap on securities | ​ |  | 720 |  | Interest income | ​ |  | — |  | Interest income | ​ |  | (421)
Total fair value hedges | ​ |  | 720 |  | ​ | ​ |  | — |  |  | ​ |  | (421)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Economic hedges: | ​ |  |  |  |  | ​ |  |  |  |  | ​ |  |
Forward commitments | ​ |  | — |  | Other income | ​ |  | — |  | Other income | ​ |  | (45)
Total economic hedges | ​ |  | — |  | ​ | ​ |  | — |  |  | ​ |  | (45)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Non-hedging derivatives: | ​ |  |  |  |  | ​ |  |  |  |  | ​ |  |
Interest rate lock commitments | ​ |  | — |  | Other income | ​ |  | — |  | Other income | ​ |  | 26
Total non-hedging derivatives | ​ |  | — |  | ​ | ​ |  | — |  |  | ​ |  | 26
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 1,775 | ​ | ​ | ​ | $ | — |  |  | ​ | $ | (840)
​ The Company expects approximately $1.0 million of losses (pre-tax) related to the Company’s cash flow hedges to be reclassified to earnings from AOCI over the next 12 months. This reclassification is due to anticipated payments that will be made and/or received on the swaps based upon the forward curve as of September 30, 2021.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, 2020
​ |  | Amount of |  | ​ |  | Amount of |  | ​ |  | ​
​ | ​ | Gain (Loss) | ​ | ​ | ​ | Gain (Loss) | ​ | ​ | ​ | ​
​ | ​ | Recognized in | ​ | ​ | ​ | Reclassified | ​ | Location of | ​ | Amount of
​ | ​ | Other | ​ | Location of Gain (Loss) | ​ | from Other | ​ | Gain (Loss) | ​ | Gain (Loss)
​ | ​ | Comprehensive | ​ | Reclassified from Other | ​ | Comprehensive | ​ | Recognized in | ​ | Recognized
(in thousands) | ​ | Income(1) | ​ | Comprehensive Income | ​ | Income | ​ | Income | ​ | in Income
Cash flow hedges: |  | ​ |  |  |  | ​ |  |  |  |  |  | ​ |
Interest rate swap on wholesale funding | ​ | $ | 362 |  | Interest expense | ​ | $ | — |  | Interest expense | ​ | $ | (427)
Total cash flow hedges | ​ | ​ | 362 | ​ | ​ | ​ |  | — |  | ​ | ​ |  | (427)
​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value hedges: | ​ | ​ |  |  |  | ​ |  |  |  |  | ​ |  |
Interest rate swap on securities | ​ |  | 635 |  | Interest income | ​ |  | — |  | Interest income | ​ |  | (204)
Total economic hedges | ​ | ​ | 635 | ​ | ​ | ​ |  | — |  |  | ​ |  | (204)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Economic hedges: | ​ | ​ |  |  |  | ​ |  |  |  |  | ​ |  |
Forward commitments | ​ |  | — |  | Other income | ​ |  | — |  | Other income | ​ |  | 40
Total economic hedges | ​ | ​ | — | ​ | ​ | ​ |  | — |  |  | ​ |  | 40
​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Non-hedging derivatives: | ​ |  |  |  |  | ​ |  |  |  |  | ​ |  |
Interest rate lock commitments | ​ |  | — |  | Other income | ​ |  | — |  | Other Income | ​ |  | (39)
Total non-hedging derivatives | ​ | ​ | — | ​ | ​ | ​ |  | — |  |  | ​ |  | (39)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 997 |  |  | ​ | $ | — |  |  | ​ | $ | (630)
(1) | Prior period has been revised, see Note 1 Basis of Presentation – Revision of Previously Issued Financial Statement.
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Nine Months Ended September 30, 2020
​ |  | Amount of |  | ​ |  | Amount of |  | ​ |  | ​
​ | ​ | Gain (Loss) | ​ | ​ | ​ | Gain (Loss) | ​ | ​ | ​ | ​
​ | ​ | Recognized in | ​ | ​ | ​ | Reclassified | ​ | Location of | ​ | Amount of
​ | ​ | Other | ​ | Location of Gain (Loss) | ​ | from Other | ​ | Gain (Loss) | ​ | Gain (Loss)
​ | ​ | Comprehensive | ​ | Reclassified from Other | ​ | Comprehensive | ​ | Recognized in | ​ | Recognized
(in thousands) | ​ | Income(1) | ​ | Comprehensive Income | ​ | Income | ​ | Income | ​ | in Income
Cash flow hedges: |  | ​ |  |  |  | ​ |  |  |  |  |  | ​ |
Interest rate swap on wholesale funding | ​ | $ | (4,247) |  | Interest expense | ​ | $ | — |  | Interest expense | ​ | $ | (642)
Total cash flow hedges | ​ | ​ | (4,247) | ​ | ​ | ​ |  | — |  | ​ | ​ |  | (642)
​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value hedges: | ​ | ​ |  |  |  | ​ |  |  |  |  | ​ |  |
Interest rate swap on securities | ​ |  | (1,545) |  | Interest income | ​ |  | — |  | Interest income | ​ |  | (145)
Total economic hedges | ​ | ​ | (1,545) | ​ | ​ | ​ |  | — |  |  | ​ |  | (145)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Economic hedges: | ​ | ​ |  |  |  | ​ |  |  |  |  | ​ |  |
Forward commitments | ​ |  | — |  | Other income | ​ |  | — |  | Other income | ​ |  | (3)
Total economic hedges | ​ | ​ | — | ​ | ​ | ​ |  | — |  |  | ​ |  | (3)
​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Non-hedging derivatives: | ​ |  |  |  |  | ​ |  |  |  |  | ​ |  |
Interest rate lock commitments | ​ |  | — |  | Other income | ​ |  | — |  | Other Income | ​ |  | (35)
Total non-hedging derivatives | ​ | ​ | — | ​ | ​ | ​ |  | — |  |  | ​ |  | (35)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | (5,792) |  |  | ​ | $ | — |  |  | ​ | $ | (825)
(1) | Prior period has been revised, see Note 1 Basis of Presentation – Revision of Previously Issued Financial Statement.
Schedule of Gain Loss in Statement of Income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, 2021
​ | ​ | Interest and Dividend Income | ​ | Interest Expense | ​ | ​ | ​
(in thousands) |  | Loans | ​ | Securities and other |  | Deposits | ​ | Borrowings |  | Non-interest Income
Income and exepense line items presented in the consolidated statements of income |  | $ | 25,094 | ​ | $ | 3,821 | ​ | $ | 1,555 | ​ | $ | 1,778 | ​ | $ | 11,350
​ |  | ​ |  | ​ | ​ | ​ |  | ​ |  | ​ | ​ | ​ |  | ​ |
The effects of cash flow and fair value hedging: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ |  |  | ​ | ​ | ​ | ​ |  |  | ​ | ​ | ​ | ​ |  |
Gain (loss) on cash flow hedges: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap on wholesale funding | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (205) | ​ | ​ | —
Interest rate swap on variable rate loans | ​ |  | 92 | ​ | ​ | — | ​ |  | — | ​ | ​ | — | ​ |  | —
​ | ​ |  |  | ​ | ​ | ​ | ​ |  |  | ​ | ​ | ​ | ​ |  |
Gain (loss) on fair value hedges: | ​ |  | ​ | ​ | ​ | ​ | ​ |  |  | ​ | ​ | ​ | ​ |  |
Interest rate swap on securities | ​ | ​ | — | ​ | ​ | (144) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, 2020
​ | ​ | Interest and Dividend Income | ​ | Interest Expense | ​ | ​ | ​
(in thousands) |  | Loans | ​ | Securities and other |  | Deposits | ​ | Borrowings |  | Non-interest Income
Income and exepense line items presented in the consolidated statements of income |  | $ | 25,918 | ​ | $ | 4,557 | ​ | $ | 3,869 | ​ | $ | 1,941 | ​ | $ | 10,102
​ |  | ​ |  | ​ | ​ | ​ |  | ​ |  | ​ | ​ | ​ |  | ​ |
The effects of cash flow and fair value hedging: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ |  |  | ​ | ​ | ​ | ​ |  |  | ​ | ​ | ​ | ​ |  |
Gain (loss) on cash flow hedges: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap on wholesale funding | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (365) | ​ | ​ | (62) | ​ | ​ | —
Interest rate swap on variable rate loans | ​ |  | — | ​ | ​ | — | ​ |  | — | ​ | ​ | — | ​ |  | —
​ | ​ |  |  | ​ | ​ | ​ | ​ |  |  | ​ | ​ | ​ | ​ |  |
Gain (loss) on fair value hedges: | ​ |  | ​ | ​ | ​ | ​ | ​ |  |  | ​ | ​ | ​ | ​ |  |
Interest rate swap on securities | ​ | ​ | — | ​ | ​ | (204) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Nine Months Ended September 30, 2021
​ | ​ | Interest and Dividend Income | ​ | Interest Expense | ​ | ​ | ​
(in thousands) |  | Loans | ​ | Securities and other |  | Deposits | ​ | Borrowings |  | Non-interest Income
Income and exepense line items presented in the consolidated statements of income |  | $ | 72,490 | ​ | ​ | 11,792 | ​ | $ | 7,109 | ​ | ​ | 5,415 | ​ | $ | 31,103
​ |  | ​ |  | ​ | ​ | ​ |  | ​ |  | ​ | ​ | ​ |  | ​ |
The effects of cash flow and fair value hedging: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ |  |  | ​ | ​ | ​ | ​ |  |  | ​ | ​ | ​ | ​ |  |
Gain (loss) on cash flow hedges: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap on wholesale funding | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (589) | ​ | ​ | —
Interest rate swap on variable rate loans | ​ |  | 189 | ​ | ​ | — | ​ |  | — | ​ | ​ | — | ​ |  | —
​ | ​ |  |  | ​ | ​ | ​ | ​ |  |  | ​ | ​ | ​ | ​ |  |
Gain (loss) on fair value hedges: | ​ |  | ​ | ​ | ​ | ​ | ​ |  |  | ​ | ​ | ​ | ​ |  |
Interest rate swap on securities | ​ | ​ | — | ​ | ​ | (421) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Nine Months Ended September 30, 2020
​ | ​ | Interest and Dividend Income | ​ | Interest Expense | ​ | ​ | ​
(in thousands) |  | Loans | ​ | Securities and other |  | Deposits | ​ | Borrowings |  | Non-interest Income
Income and exepense line items presented in the consolidated statements of income |  | $ | 80,398 | ​ | ​ | 15,006 | ​ | $ | 14,437 | ​ | ​ | 7,149 | ​ | $ | 28,233
​ |  | ​ |  | ​ | ​ | ​ |  | ​ |  | ​ | ​ | ​ |  | ​ |
The effects of cash flow and fair value hedging: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ |  |  | ​ | ​ | ​ | ​ |  |  | ​ | ​ | ​ | ​ |  |
Gain (loss) on cash flow hedges: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap on wholesale funding | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (580) | ​ | ​ | (62) | ​ | ​ | —
Interest rate swap on variable rate loans | ​ |  | — | ​ | ​ | — | ​ |  | — | ​ | ​ | — | ​ |  | —
​ | ​ |  |  | ​ | ​ | ​ | ​ |  |  | ​ | ​ | ​ | ​ |  |
Gain (loss) on fair value hedges: | ​ |  | ​ | ​ | ​ | ​ | ​ |  |  | ​ | ​ | ​ | ​ |  |
Interest rate swap on securities | ​ | ​ | — | ​ | ​ | (145) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Schedule of Offsetting Liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Gross Amounts Offset in the Consolidated Balance Sheet
​ | ​ | Derivative | ​ | ​ | ​ | Cash Collateral | ​ | ​ | ​
(in thousands) |  | Liabilities |  | Derivative Assets |  | Pledged |  | Net Amount
As of September 30, 2021 | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Customer Loan Derivatives: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
MNA counterparty | ​ | $ | (10,258) | ​ | $ | 10,258 | ​ | $ | 17,000 | ​ | $ | 17,000
RPA counterparty | ​ |  | (5,892) | ​ |  | 5,892 | ​ |  | — | ​ |  | —
Total | ​ | $ | (16,150) | ​ | $ | 16,150 | ​ | $ | 17,000 | ​ | $ | 17,000
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Gross Amounts Offset in the Consolidated Balance Sheet
​ | ​ | Derivative | ​ | ​ | ​ | Cash Collateral | ​ | ​ | ​
(in thousands) |  | Liabilities |  | Derivative Assets |  | Pledged |  | Net Amount
As of December 31, 2020 | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Customer Loan Derivatives: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
MNA counterparty | ​ | $ | (15,938) | ​ | $ | 15,938 | ​ | $ | 23,450 | ​ | $ | 23,450
RPA counterparty | ​ |  | (9,957) | ​ |  | 9,957 | ​ |  | — | ​ |  | —
Total | ​ | $ | (25,895) | ​ | $ | 25,895 | ​ | $ | 23,450 | ​ | $ | 23,450

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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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