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Note 9 - Loans - Aging of Loan Portfolio (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Loans | $ 17,787,888 | $ 16,342,479
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans | 9,376 | 32,812
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans | 11,050 | 13,015
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans | 1,737 | 1,439
Financial Asset, Past Due [Member] |  |
Loans | 82,815 | 113,112
Non-accrual loans | 60,652 | 65,846
Financial Asset, Not Past Due [Member] |  |
Loans | 17,705,073 | 16,229,367
Commercial Portfolio Segment [Member] |  |
Loans | 3,194,509 | 2,982,399
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans | 7,347 | 4,294
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans | 534 | 9,877
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans | 1,372 | 1,439
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member] |  |
Loans | 37,102 | 32,168
Non-accrual loans | 27,849 | 16,558
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans | 3,157,407 | 2,950,231
Real Estate Construction Portfolio Segment [Member] |  |
Loans | 602,052 | 611,031
Real Estate Construction Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans | 0 | 0
Real Estate Construction Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans | 0 | 0
Real Estate Construction Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans | 0 | 0
Real Estate Construction Portfolio Segment [Member] | Financial Asset, Past Due [Member] |  |
Loans | 0 | 0
Non-accrual loans | 0 | 0
Real Estate Construction Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans | 602,052 | 611,031
Commercial Real Estate Portfolio Segment [Member] |  |
Loans | 8,563,001 | 8,143,272
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans | 1,616 | 8,389
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans | 4,536 | 0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans | 0 | 0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] |  |
Loans | 21,293 | 46,562
Non-accrual loans | 15,141 | 38,173
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans | 8,541,708 | 8,096,710
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |
Loans | 5,422,392 | 4,601,493
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans | 391 | 20,129
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans | 5,980 | 3,138
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans | 355 | 0
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, Past Due [Member] |  |
Loans | 24,309 | 34,382
Non-accrual loans | 17,583 | 11,115
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans | 5,398,083 | 4,567,111
Installment and Other Loans [Member ] |  |
Loans | 5,934 | 4,284
Installment and Other Loans [Member ] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans | 22 | 0
Installment and Other Loans [Member ] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans | 0 | 0
Installment and Other Loans [Member ] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans | 10 | 0
Installment and Other Loans [Member ] | Financial Asset, Past Due [Member] |  |
Loans | 111 | 0
Non-accrual loans | 79 | 0
Installment and Other Loans [Member ] | Financial Asset, Not Past Due [Member] |  |
Loans | $ 5,823 | $ 4,284

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