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Accumulated Other Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Loan interest income | $ 146,200 | $ 123,994
Income before income taxes | 73,127 | 64,401
Income tax provision | (15,605) | (12,548)
Net Income | 57,522 | 51,853
Compensation and employee benefits | 63,079 | 51,736
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains and Losses on Available-for-Sale Debt Securities [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Income before income taxes | 1,402 | 0
Income tax provision | (326) | 0
Net Income | 1,076 | 0
Reclassification out of Accumulated Other Comprehensive Income [Member] | Amortization of unrealized gains and losses related to available for sale securities transfer |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Loan interest income | 1,402 | 0
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains and Losses on Pension Plan Liability [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Income before income taxes | (131) | (150)
Income tax provision | 30 | 35
Net Income | (101) | (115)
Compensation and employee benefits | (131) | (150)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized gains and losses from hedging instruments |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Income before income taxes | 2,575 | 2,576
Income tax provision | (599) | (599)
Net Income | 1,976 | 1,977
Loans | $ 2,575 | $ 2,576

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