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Note 8 - Loans - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Balance | $ 122,555 | $ 122,084 | $ 122,391 | $ 123,279
Provision/(reversal) for possible credit losses | 0 | 0 | 0 | (3,000)
Charge-offs | (1,713) | (878) | (2,944) | (897)
Recoveries | 1,809 | 693 | 3,204 | 2,517
Net (charge-offs)/recoveries | 96 | (185) | 260 | 1,620
Balance | 122,651 | 121,899 | 122,651 | 121,899
Reserve for impaired loans | 1,686 | 3,833 | 1,686 | 3,833
Reserve for non-impaired loans | 120,965 | 118,066 | 120,965 | 118,066
Reserve for off-balance sheet credit commitments | 4,550 | 3,088 | 4,550 | 3,088
Commercial Portfolio Segment [Member] |  |  |  |
Balance | 54,750 | 54,597 | 54,978 | 49,796
Provision/(reversal) for possible credit losses | (100) | 920 | 862 | 4,827
Charge-offs | (1,713) | (488) | (2,944) | (507)
Recoveries | 1,356 | 150 | 1,397 | 1,063
Net (charge-offs)/recoveries | (357) | (338) | (1,547) | 556
Balance | 54,293 | 55,179 | 54,293 | 55,179
Reserve for impaired loans | 832 | 2,463 | 832 | 2,463
Reserve for non-impaired loans | 53,461 | 52,716 | 53,461 | 52,716
Reserve for off-balance sheet credit commitments | 2,090 | 1,606 | 2,090 | 1,606
Real Estate Construction Portfolio Segment [Member] |  |  |  |
Balance | 20,723 | 21,864 | 19,626 | 24,838
Provision/(reversal) for possible credit losses | 257 | (1,245) | 310 | (4,263)
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 30 | 44 | 1,074 | 88
Net (charge-offs)/recoveries | 30 | 44 | 1,074 | 88
Balance | 21,010 | 20,663 | 21,010 | 20,663
Reserve for impaired loans | 0 | 0 | 0 | 0
Reserve for non-impaired loans | 21,010 | 20,663 | 21,010 | 20,663
Reserve for off-balance sheet credit commitments | 2,029 | 1,207 | 2,029 | 1,207
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Balance | 33,073 | 34,230 | 33,487 | 37,610
Provision/(reversal) for possible credit losses | (180) | (533) | (746) | (4,696)
Charge-offs | 0 | (161) | 0 | (161)
Recoveries | 261 | 440 | 413 | 1,223
Net (charge-offs)/recoveries | 261 | 279 | 413 | 1,062
Balance | 33,154 | 33,976 | 33,154 | 33,976
Reserve for impaired loans | 620 | 1,036 | 620 | 1,036
Reserve for non-impaired loans | 32,534 | 32,940 | 32,534 | 32,940
Reserve for off-balance sheet credit commitments | 137 | 77 | 137 | 77
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |  |  |
Balance | 13,975 | 11,372 | 14,282 | 11,013
Provision/(reversal) for possible credit losses | 27 | 860 | (438) | 1,135
Charge-offs | 0 | (229) | 0 | (229)
Recoveries | 162 | 59 | 320 | 143
Net (charge-offs)/recoveries | 162 | (170) | 320 | (86)
Balance | 14,164 | 12,062 | 14,164 | 12,062
Reserve for impaired loans | 234 | 334 | 234 | 334
Reserve for non-impaired loans | 13,930 | 11,728 | 13,930 | 11,728
Reserve for off-balance sheet credit commitments | 290 | 190 | 290 | 190
Installment and Other Loans [Member ] |  |  |  |
Balance | 34 | 21 | 18 | 22
Provision/(reversal) for possible credit losses | (4) | (2) | 12 | (3)
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Net (charge-offs)/recoveries | 0 | 0 | 0 | 0
Balance | 30 | 19 | 30 | 19
Reserve for impaired loans | 0 | 0 | 0 | 0
Reserve for non-impaired loans | 30 | 19 | 30 | 19
Reserve for off-balance sheet credit commitments | $ 4 | $ 8 | $ 4 | $ 8

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