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Note 4 - Loans/Leases Receivable - Allowance for Estimated Losses on Loans Leases (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018
Balance |  |  |  |  | $ 39,847 |  |  |  | $ 34,356 | $ 39,847 | $ 34,356 | $ 30,757 |  |
Removal of allowance related to RB&T loans/leases sold |  |  |  |  |  |  |  |  |  |  | (6,122) |  |  |
Provisions charged to expense |  | $ 979 | $ 2,012 | $ 1,941 | 2,134 | $ 1,612 | $ 6,206 | $ 2,301 | 2,540 | 7,066 | 12,658 | 8,470 |  |
Loans/leases charged off |  |  |  |  |  |  |  |  |  | (5,134) | (7,919) | (5,373) |  |
Recoveries on loans/leases previously charged off |  |  |  |  |  |  |  |  |  | 772 | 752 | 502 |  |
Balance |  | 36,001 |  |  |  | 39,847 |  |  |  | 36,001 | 39,847 | 34,356 |  |
Allowance for impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | $ 660 | $ 3,659
Allowance for nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 35,341 | 36,188
Less allowance for estimated losses on loans/leases |  | 36,001 |  |  | 39,847 | 39,847 |  |  | 34,356 | 36,001 | 39,847 | 34,356 | 36,001 | 39,847
Impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 8,661 | 20,203
Nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 3,672,685 | 3,703,427
Loans and leases |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,681,346 | $ 3,723,630
Allowance as a percentage of impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 7.62% | 18.11%
Allowance as a percentage of nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 0.96% | 0.98%
Total allowance as a percentage of total loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 0.98% | 1.07%
Asset held-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provision related to loans included in assets held for sale |  |  |  |  |  |  |  |  |  | 428 |  |  |  |
Provision For Loan Lease And Other Losses Excluding Provision Related To Loans Assets Held For Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provisions charged to expense |  |  |  |  |  |  |  |  |  | 6,638 |  |  |  |
Commercial Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  |  | 16,420 |  |  |  | 14,323 | 16,420 | 14,323 | 12,545 |  |
Removal of allowance related to RB&T loans/leases sold |  |  |  |  |  |  |  |  |  |  | (2,814) |  |  |
Provisions charged to expense |  |  |  |  |  |  |  |  |  |  | 7,161 | 2,736 |  |
Loans/leases charged off |  |  |  |  |  |  |  |  |  | (1,476) | (5,359) | (1,150) |  |
Recoveries on loans/leases previously charged off |  |  |  |  |  |  |  |  |  | 276 | 295 | 192 |  |
Balance |  | 16,072 |  |  |  | 16,420 |  |  |  | 16,072 | 16,420 | 14,323 |  |
Allowance for impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | $ 170 | $ 973
Allowance for nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 15,902 | 15,447
Less allowance for estimated losses on loans/leases |  | 16,072 |  |  | 16,420 | 16,420 |  |  | 14,323 | 16,072 | 16,420 | 14,323 | 16,072 | 16,420
Impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 1,846 | 4,499
Nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 1,505,979 | 1,424,911
Loans and leases |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,507,825 | $ 1,429,410
Allowance as a percentage of impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 9.21% | 21.62%
Allowance as a percentage of nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 1.06% | 1.08%
Total allowance as a percentage of total loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 1.07% | 1.15%
Commercial Portfolio Segment [Member] | Provision For Loan Lease And Other Losses Excluding Provision Related To Loans Assets Held For Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provisions charged to expense |  |  |  |  |  |  |  |  |  | 3,666 |  |  |  |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  |  | 17,719 |  |  |  | 13,963 | 17,719 | 13,963 | 11,671 |  |
Removal of allowance related to RB&T loans/leases sold |  |  |  |  |  |  |  |  |  |  | (2,392) |  |  |
Provisions charged to expense |  |  |  |  |  |  |  |  |  |  | 4,094 | 4,044 |  |
Loans/leases charged off |  |  |  |  |  |  |  |  |  | (1,722) | (387) | (1,795) |  |
Recoveries on loans/leases previously charged off |  |  |  |  |  |  |  |  |  | 208 | 49 | 43 |  |
Balance |  | 15,379 |  |  |  | 17,719 |  |  |  | 15,379 | 17,719 | 13,963 |  |
Allowance for impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | $ 125 | $ 2,124
Allowance for nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 15,254 | 15,595
Less allowance for estimated losses on loans/leases |  | 15,379 |  |  | 17,719 | 17,719 |  |  | 13,963 | 15,379 | 17,719 | 13,963 | 15,379 | 17,719
Impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 3,585 | 10,447
Nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 1,732,811 | 1,755,664
Loans and leases |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,736,396 | $ 1,766,111
Allowance as a percentage of impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 3.49% | 20.33%
Allowance as a percentage of nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 0.88% | 0.89%
Total allowance as a percentage of total loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 0.89% | 1.00%
Commercial Real Estate Portfolio Segment [Member] | Provision For Loan Lease And Other Losses Excluding Provision Related To Loans Assets Held For Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provisions charged to expense |  |  |  |  |  |  |  |  |  | 1,566 |  |  |  |
Finance Leases Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  |  | 1,792 |  |  |  | 2,382 | 1,792 | 2,382 | 3,112 |  |
Provisions charged to expense |  |  |  |  |  |  |  |  |  |  | 1,068 | 1,370 |  |
Loans/leases charged off |  |  |  |  |  |  |  |  |  | (1,647) | (2,002) | (2,285) |  |
Recoveries on loans/leases previously charged off |  |  |  |  |  |  |  |  |  | 190 | 344 | 185 |  |
Balance |  | 1,464 |  |  |  | 1,792 |  |  |  | 1,464 | 1,792 | 2,382 |  |
Allowance for impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | $ 270 | $ 194
Allowance for nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 1,194 | 1,598
Less allowance for estimated losses on loans/leases |  | 1,464 |  |  | 1,792 | 1,792 |  |  | 2,382 | 1,464 | 1,792 | 2,382 | 1,464 | 1,792
Impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 2,025 | 2,249
Nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 85,844 | 115,720
Loans and leases |  |  |  |  |  |  |  |  |  |  |  |  | $ 87,869 | $ 117,969
Allowance as a percentage of impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 13.33% | 8.63%
Allowance as a percentage of nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 1.39% | 1.38%
Total allowance as a percentage of total loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 1.67% | 1.52%
Finance Leases Portfolio Segment [Member] | Provision For Loan Lease And Other Losses Excluding Provision Related To Loans Assets Held For Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provisions charged to expense |  |  |  |  |  |  |  |  |  | 1,129 |  |  |  |
Residential Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  |  | 2,557 |  |  |  | 2,466 | 2,557 | 2,466 | 2,342 |  |
Removal of allowance related to RB&T loans/leases sold |  |  |  |  |  |  |  |  |  |  | (628) |  |  |
Provisions charged to expense |  |  |  |  |  |  |  |  |  |  | 193 | 197 |  |
Loans/leases charged off |  |  |  |  |  |  |  |  |  | (191) | (127) | (102) |  |
Recoveries on loans/leases previously charged off |  |  |  |  |  |  |  |  |  | 47 | 25 | 29 |  |
Balance |  | 1,948 |  |  |  | 2,557 |  |  |  | 1,948 | 2,557 | 2,466 |  |
Allowance for impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | $ 15 | $ 257
Allowance for nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 1,933 | 2,300
Less allowance for estimated losses on loans/leases |  | 1,948 |  |  | 2,557 | 2,557 |  |  | 2,466 | 1,948 | 2,557 | 2,466 | 1,948 | 2,557
Impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 649 | 2,110
Nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 239,255 | 288,649
Loans and leases | [1] |  |  |  |  |  |  |  |  |  |  |  | $ 239,904 | $ 290,759
Allowance as a percentage of impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 2.31% | 12.18%
Allowance as a percentage of nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 0.81% | 0.80%
Total allowance as a percentage of total loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 0.81% | 0.88%
Residential Portfolio Segment [Member] | Provision For Loan Lease And Other Losses Excluding Provision Related To Loans Assets Held For Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provisions charged to expense |  |  |  |  |  |  |  |  |  | 163 |  |  |  |
Consumer Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  |  | 1,359 |  |  |  | 1,222 | 1,359 | 1,222 | 1,087 |  |
Removal of allowance related to RB&T loans/leases sold |  |  |  |  |  |  |  |  |  |  | (288) |  |  |
Provisions charged to expense |  |  |  |  |  |  |  |  |  |  | 142 | 123 |  |
Loans/leases charged off |  |  |  |  |  |  |  |  |  | (98) | (44) | (41) |  |
Recoveries on loans/leases previously charged off |  |  |  |  |  |  |  |  |  | 51 | 39 | 53 |  |
Balance |  | 1,138 |  |  |  | 1,359 |  |  |  | 1,138 | 1,359 | 1,222 |  |
Allowance for impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | $ 80 | $ 111
Allowance for nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 1,058 | 1,248
Less allowance for estimated losses on loans/leases |  | $ 1,138 |  |  | $ 1,359 | $ 1,359 |  |  | $ 1,222 | 1,138 | $ 1,359 | $ 1,222 | 1,138 | 1,359
Impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 556 | 898
Nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 108,796 | 118,483
Loans and leases |  |  |  |  |  |  |  |  |  |  |  |  | $ 109,352 | $ 119,381
Allowance as a percentage of impaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 14.39% | 12.38%
Allowance as a percentage of nonimpaired loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 0.97% | 1.05%
Total allowance as a percentage of total loans/leases |  |  |  |  |  |  |  |  |  |  |  |  | 1.04% | 1.14%
Consumer Portfolio Segment [Member] | Provision For Loan Lease And Other Losses Excluding Provision Related To Loans Assets Held For Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provisions charged to expense |  |  |  |  |  |  |  |  |  | $ 114 |  |  |  |
[1] | Includes residential real estate loans held for sale totaling $3.7 million and $1.3 million as of December 31, 2019 and 2018, respectively.

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- Definition The percentage of allowance on loans leases collectively evaluated for impairment. + References No definition available. + Details
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- Definition The percentage of allowance on loans leases individually evaluated for impairment. + References No definition available. + Details
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- Definition The percentage of allowance on loans leases. + References No definition available. + Details
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- Definition Removal of allowance related to loans and leases sold. + References No definition available. + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=118955255&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524 + Details
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