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Note 8 - Loans (Details) - Allowance for Loan Losses by Portfolio Segment - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Balance | $ 153,437 | $ 169,077 | $ 161,420 | $ 173,889
Provision/(reversal) for possible loan losses | (1,250) | (5,101) | (8,400) | (9,172)
Charge-offs | (3,407) | (1,155) | (10,528) | (12,732)
Recoveries | 1,296 | 6,377 | 7,584 | 17,213
Net charge-offs | (2,111) | 5,222 | (2,944) | 4,481
Balance | 150,076 | 169,198 | 150,076 | 169,198
Reserve to impaired loans | 14,323 | 13,814 | 14,323 | 13,814
Reserve to non-impaired loans | 135,753 | 155,384 | 135,753 | 155,384
Reserve for off-balance sheet credit commitments | 1,420 | 2,018 | 1,420 | 2,018
Commercial Portfolio Segment [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Balance | 47,540 | 63,239 | 47,501 | 65,103
Provision/(reversal) for possible loan losses | 10,040 | (10,839) | 11,045 | (12,067)
Charge-offs | (3,310) | (252) | (6,754) | (7,592)
Recoveries | 607 | 4,148 | 3,085 | 10,852
Net charge-offs | (2,703) | 3,896 | (3,669) | 3,260
Balance | 54,877 | 56,296 | 54,877 | 56,296
Reserve to impaired loans | 7,561 | 2,730 | 7,561 | 2,730
Reserve to non-impaired loans | 47,316 | 53,566 | 47,316 | 53,566
Reserve for off-balance sheet credit commitments | 703 | 901 | 703 | 901
Real Estate Construction Portfolio Segment [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Balance | 26,304 | 9,555 | 27,652 | 11,999
Provision/(reversal) for possible loan losses | 121 | 25,116 | (1,349) | 24,460
Charge-offs | 0 | 0 | 0 | (1,813)
Recoveries | 41 | 32 | 163 | 57
Net charge-offs | 41 | 32 | 163 | (1,756)
Balance | 26,466 | 34,703 | 26,466 | 34,703
Reserve to impaired loans | 0 | 2,604 | 0 | 2,604
Reserve to non-impaired loans | 26,466 | 32,099 | 26,466 | 32,099
Reserve for off-balance sheet credit commitments | 477 | 668 | 477 | 668
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Balance | 67,245 | 83,395 | 74,673 | 84,753
Provision/(reversal) for possible loan losses | (11,762) | (17,950) | (19,342) | (20,991)
Charge-offs | (97) | (903) | (3,613) | (3,327)
Recoveries | 647 | 2,197 | 4,315 | 6,304
Net charge-offs | 550 | 1,294 | 702 | 2,977
Balance | 56,033 | 66,739 | 56,033 | 66,739
Reserve to impaired loans | 6,389 | 7,999 | 6,389 | 7,999
Reserve to non-impaired loans | 49,604 | 58,740 | 49,604 | 58,740
Reserve for off-balance sheet credit commitments | 202 | 410 | 202 | 410
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Balance | 12,323 | 12,870 | 11,578 | 12,005
Provision/(reversal) for possible loan losses | 353 | (1,427) | 1,239 | (562)
Charge-offs | 0 | 0 | (161) | 0
Recoveries | 1 | 0 | 21 | 0
Net charge-offs | 1 |  | (140) | 0
Balance | 12,677 | 11,443 | 12,677 | 11,443
Reserve to impaired loans | 373 | 481 | 373 | 481
Reserve to non-impaired loans | 12,304 | 10,962 | 12,304 | 10,962
Reserve for off-balance sheet credit commitments | 37 | 39 | 37 | 39
Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Balance | 25 | 18 | 16 | 29
Provision/(reversal) for possible loan losses | (2) | (1) | 7 | (12)
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Net charge-offs | 0 |  | 0 | 0
Balance | 23 | 17 | 23 | 17
Reserve to impaired loans | 0 | 0 | 0 | 0
Reserve to non-impaired loans | 23 | 17 | 23 | 17
Reserve for off-balance sheet credit commitments | $ 1 | $ 0 | $ 1 | $ 0

X
- Definition Amount of direct write-downs of financing receivables charged against the allowance net of recoveries. + References No definition available. + Details
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Period Type: | duration

X
- Definition Amount of provision (reversal) related to loan transactions based on the assessment of uncollectability from the counterparty to reduce the account to their net realizable value. + References No definition available. + Details
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- Definition The reserve for off-balance sheet credit commitments. + References No definition available. + Details
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- Definition The reserve for impaired loans. + References No definition available. + Details
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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=49124121&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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 + Details
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