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Loans and Lease Finance Receivables and Allowance for Loan Losses - Summary of loans by type and origination year, according to our internal risk ratings (Detail) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | $ 229,027 |
2019 | 996,807 |
2018 | 954,745 |
2017 | 997,179 |
2016 | 779,281 |
Prior | 2,435,073 |
Revolving loans amortized cost basis | 1,016,807 |
Revolving loans converted to term loans | 57,233 |
Total | 7,466,152 | $ 7,568,319
Commercial And Industrial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 36,167 |
2019 | 160,951 |
2018 | 88,009 |
2017 | 76,840 |
2016 | 49,874 |
Prior | 89,364 |
Revolving loans amortized cost basis | 447,040 |
Revolving loans converted to term loans | 12,516 |
Total | 960,761 |
Commercial Trade Financing [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 26,599 |
2019 | 18,009 |
2018 | 49,840 |
2017 | 82,231 |
2016 | 30,803 |
Prior | 105,589 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 313,071 |
Real Estate Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 153,366 |
2019 | 731,611 |
2018 | 758,170 |
2017 | 754,616 |
2016 | 635,087 |
Prior | 2,093,573 |
Revolving loans amortized cost basis | 201,042 |
Revolving loans converted to term loans | 20,460 |
Total | 5,347,925 |
Construction Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 550 |
2019 | 13,414 |
2018 | 13,300 |
2017 | 35,130 |
2016 | 10,592 |
Prior | 5 |
Revolving loans amortized cost basis | 49,591 |
Revolving loans converted to term loans | 5,463 |
Total | 128,045 |
Consumer Mortgage [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 10,473 |
2019 | 66,680 |
2018 | 38,192 |
2017 | 27,198 |
2016 | 35,992 |
Prior | 99,762 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 446 |
Total | 278,743 |
Dairy And Livestock And Agribusiness [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 78 |
2019 | 2,945 |
2018 | 2,988 |
2017 | 8,831 |
2016 | 6,847 |
Prior | 14,655 |
Revolving loans amortized cost basis | 219,424 |
Revolving loans converted to term loans | 16,346 |
Total | 272,114 |
Municipal Lease Finance Receivables [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 147 |
2019 | 0 |
2018 | 3,081 |
2017 | 10,961 |
2016 | 7,912 |
Prior | 29,186 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 51,287 | 53,146
Consumer Other [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 1,647 |
2019 | 3,197 |
2018 | 1,165 |
2017 | 1,372 |
2016 | 2,174 |
Prior | 2,939 |
Revolving loans amortized cost basis | 99,710 |
Revolving loans converted to term loans | 2,002 |
Total | 114,206 |
Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 227,961 |
2019 | 991,064 |
2018 | 929,806 |
2017 | 966,220 |
2016 | 762,602 |
Prior | 2,344,233 |
Revolving loans amortized cost basis | 961,714 |
Revolving loans converted to term loans | 34,641 |
Total | 7,218,241 | 7,321,402
Pass [Member] | Commercial And Industrial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 35,101 |
2019 | 160,551 |
2018 | 79,808 |
2017 | 74,291 |
2016 | 48,698 |
Prior | 85,803 |
Revolving loans amortized cost basis | 423,186 |
Revolving loans converted to term loans | 8,849 |
Total | 916,287 |
Pass [Member] | Commercial Trade Financing [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 26,599 |
2019 | 18,009 |
2018 | 48,416 |
2017 | 77,219 |
2016 | 27,922 |
Prior | 93,865 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 292,030 |
Pass [Member] | Real Estate Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 153,366 |
2019 | 726,268 |
2018 | 743,909 |
2017 | 732,319 |
2016 | 626,561 |
Prior | 2,021,759 |
Revolving loans amortized cost basis | 197,335 |
Revolving loans converted to term loans | 18,747 |
Total | 5,220,264 |
Pass [Member] | Construction Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 550 |
2019 | 13,414 |
2018 | 13,300 |
2017 | 35,130 |
2016 | 10,592 |
Prior | 5 |
Revolving loans amortized cost basis | 49,591 |
Revolving loans converted to term loans | 5,463 |
Total | 128,045 |
Pass [Member] | Consumer Mortgage [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 10,473 |
2019 | 66,680 |
2018 | 38,192 |
2017 | 26,819 |
2016 | 35,992 |
Prior | 96,795 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 274,951 |
Pass [Member] | Dairy And Livestock And Agribusiness [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 78 |
2019 | 2,945 |
2018 | 1,940 |
2017 | 8,109 |
2016 | 2,831 |
Prior | 14,655 |
Revolving loans amortized cost basis | 192,649 |
Revolving loans converted to term loans | 0 |
Total | 223,207 |
Pass [Member] | Municipal Lease Finance Receivables [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 147 |
2019 | 0 |
2018 | 3,081 |
2017 | 10,961 |
2016 | 7,912 |
Prior | 28,739 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 50,840 |
Pass [Member] | Consumer Other [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 1,647 |
2019 | 3,197 |
2018 | 1,160 |
2017 | 1,372 |
2016 | 2,094 |
Prior | 2,612 |
Revolving loans amortized cost basis | 98,953 |
Revolving loans converted to term loans | 1,582 |
Total | 112,617 |
Special Mention [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 1,066 |
2019 | 5,600 |
2018 | 16,677 |
2017 | 20,077 |
2016 | 9,107 |
Prior | 66,865 |
Revolving loans amortized cost basis | 38,814 |
Revolving loans converted to term loans | 6,128 |
Total | 164,334 | 173,486
Special Mention [Member] | Commercial And Industrial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 1,066 |
2019 | 257 |
2018 | 7,405 |
2017 | 1,694 |
2016 | 539 |
Prior | 3,524 |
Revolving loans amortized cost basis | 12,598 |
Revolving loans converted to term loans | 2,442 |
Total | 29,525 |
Special Mention [Member] | Commercial Trade Financing [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 1,177 |
2016 | 1,277 |
Prior | 7,809 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 10,263 |
Special Mention [Member] | Real Estate Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 5,343 |
2018 | 9,106 |
2017 | 16,484 |
2016 | 7,211 |
Prior | 52,995 |
Revolving loans amortized cost basis | 3,457 |
Revolving loans converted to term loans | 0 |
Total | 94,596 |
Special Mention [Member] | Construction Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 0 |
Special Mention [Member] | Consumer Mortgage [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
Prior | 1,942 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 1,942 |
Special Mention [Member] | Dairy And Livestock And Agribusiness [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 166 |
2017 | 722 |
2016 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 22,150 |
Revolving loans converted to term loans | 3,686 |
Total | 26,724 |
Special Mention [Member] | Municipal Lease Finance Receivables [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
Prior | 447 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 447 |
Special Mention [Member] | Consumer Other [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 80 |
Prior | 148 |
Revolving loans amortized cost basis | 609 |
Revolving loans converted to term loans | 0 |
Total | 837 |
Substandard [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 143 |
2018 | 8,262 |
2017 | 10,882 |
2016 | 7,572 |
Prior | 23,975 |
Revolving loans amortized cost basis | 16,279 |
Revolving loans converted to term loans | 16,464 |
Total | 83,577 | 73,431
Substandard [Member] | Commercial And Industrial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 143 |
2018 | 796 |
2017 | 855 |
2016 | 637 |
Prior | 37 |
Revolving loans amortized cost basis | 11,256 |
Revolving loans converted to term loans | 1,225 |
Total | 14,949 |
Substandard [Member] | Commercial Trade Financing [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 1,424 |
2017 | 3,835 |
2016 | 1,604 |
Prior | 3,915 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 10,778 |
Substandard [Member] | Real Estate Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 5,155 |
2017 | 5,813 |
2016 | 1,315 |
Prior | 18,819 |
Revolving loans amortized cost basis | 250 |
Revolving loans converted to term loans | 1,713 |
Total | 33,065 |
Substandard [Member] | Construction Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 0 |
Substandard [Member] | Consumer Mortgage [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 379 |
2016 | 0 |
Prior | 1,025 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 446 |
Total | 1,850 |
Substandard [Member] | Dairy And Livestock And Agribusiness [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 882 |
2017 | 0 |
2016 | 4,016 |
Prior | 0 |
Revolving loans amortized cost basis | 4,625 |
Revolving loans converted to term loans | 12,660 |
Total | 22,183 |
Substandard [Member] | Municipal Lease Finance Receivables [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 0 |
Substandard [Member] | Consumer Other [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 5 |
2017 | 0 |
2016 | 0 |
Prior | 179 |
Revolving loans amortized cost basis | 148 |
Revolving loans converted to term loans | 420 |
Total | 752 |
Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 0 | $ 0
Doubtful [Member] | Commercial And Industrial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 0 |
Doubtful [Member] | Commercial Trade Financing [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 0 |
Doubtful [Member] | Real Estate Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 0 |
Doubtful [Member] | Construction Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 0 |
Doubtful [Member] | Consumer Mortgage [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 0 |
Doubtful [Member] | Dairy And Livestock And Agribusiness [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 0 |
Doubtful [Member] | Municipal Lease Finance Receivables [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | 0 |
Doubtful [Member] | Consumer Other [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term loans | 0 |
Total | $ 0 |

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