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Loans, Allowance for Loan Losses and Credit Quality (Int Inc. Recognized on Impaired Loans by Portfolio) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2019
Interest income recognized on impaired loans |  |
Average Recorded Investment | $ 54,648 | $ 56,449
Interest Income Recognized | 341 | 683
WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |
Interest income recognized on impaired loans |  |
Average Recorded Investment | 44,717 | 46,427
Interest Income Recognized | 240 | 483
WITH AN ALLOWANCE RECORDED: [Member] |  |
Interest income recognized on impaired loans |  |
Average Recorded Investment | 9,931 | 10,022
Interest Income Recognized | 101 | 200
Commercial and Industrial [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |
Interest income recognized on impaired loans |  |
Average Recorded Investment | 27,406 | 28,971
Interest Income Recognized | 34 | 70
Commercial and Industrial [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |
Interest income recognized on impaired loans |  |
Average Recorded Investment | 268 | 270
Interest Income Recognized | 3 | 6
Commercial Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |
Interest income recognized on impaired loans |  |
Average Recorded Investment | 7,496 | 7,582
Interest Income Recognized | 92 | 186
Commercial Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |
Interest income recognized on impaired loans |  |
Average Recorded Investment | 1,662 | 1,672
Interest Income Recognized | 24 | 49
Small Business [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |
Interest income recognized on impaired loans |  |
Average Recorded Investment | 309 | 319
Interest Income Recognized | 2 | 6
Small Business [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |
Interest income recognized on impaired loans |  |
Average Recorded Investment | 190 | 192
Interest Income Recognized | 2 | 5
Residential Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |
Interest income recognized on impaired loans |  |
Average Recorded Investment | 4,713 | 4,727
Interest Income Recognized | 58 | 113
Residential Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |
Interest income recognized on impaired loans |  |
Average Recorded Investment | 6,707 | 6,775
Interest Income Recognized | 59 | 116
Consumer Home Equity [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |
Interest income recognized on impaired loans |  |
Average Recorded Investment | 4,751 | 4,783
Interest Income Recognized | 53 | 107
Consumer Home Equity [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |
Interest income recognized on impaired loans |  |
Average Recorded Investment | 972 | 978
Interest Income Recognized | 11 | 22
Consumer - Other [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |
Interest income recognized on impaired loans |  |
Average Recorded Investment | 42 | 45
Interest Income Recognized | 1 | 1
Consumer - Other [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |
Interest income recognized on impaired loans |  |
Average Recorded Investment | 132 | 135
Interest Income Recognized | $ 2 | $ 2

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