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Note 7 - Loans (Details) - Allowance for Loan Losses by Portfolio Segment (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Provision for possible credit losses | $ 617 | $ (37)
Commercial Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | 65,103 | 66,101
Provision for possible credit losses | 4,888 | (3,310)
Charge-offs | (7,226) | (2,690)
Recoveries | 2,017 | 955
Net charge-offs | (5,209) | (1,735)
Ending Balance | 64,782 | 61,056
Reserve for impaired loans | 4,663 | 1,717
Reserve for non-impaired loans | 60,119 | 59,339
Reserve for off-balance sheet credit commitments | 929 | 837
Real Estate Construction Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | 11,999 | 23,017
Provision for possible credit losses | (1,398) | (2,399)
Recoveries | 25 | 79
Net charge-offs | 25 | 79
Ending Balance | 10,626 | 20,697
Reserve for impaired loans | 3,129 | 8,080
Reserve for non-impaired loans | 7,497 | 12,617
Reserve for off-balance sheet credit commitments | 326 | 311
Commercial Mortgage Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | 84,753 | 82,473
Provision for possible credit losses | (4,306) | 2,968
Charge-offs | (1,698) | (990)
Recoveries | 2,577 | 365
Net charge-offs | 879 | (625)
Ending Balance | 81,326 | 84,816
Reserve for impaired loans | 6,165 | 6,242
Reserve for non-impaired loans | 75,161 | 78,574
Reserve for off-balance sheet credit commitments | 445 | 2,122
Residential Mortgage And Equity Lines Member |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | 12,005 | 11,703
Provision for possible credit losses | 447 | 795
Charge-offs | (78) | (410)
Recoveries | 3 | 3
Net charge-offs | (75) | (407)
Ending Balance | 12,377 | 12,091
Reserve for impaired loans | 538 | 1,318
Reserve for non-impaired loans | 11,839 | 10,773
Reserve for off-balance sheet credit commitments | 33 | 33
Installment And Other Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | 29 | 28
Provision for possible credit losses | (2) | 4
Ending Balance | 27 | 32
Reserve for impaired loans |  | 0
Reserve for non-impaired loans | 27 | 32
Reserve for off-balance sheet credit commitments | 1 | 2
Total [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | 173,889 | 183,322
Provision for possible credit losses | (371) | (1,942)
Charge-offs | (9,002) | (4,090)
Recoveries | 4,622 | 1,402
Net charge-offs | (4,380) | (2,688)
Ending Balance | 169,138 | 178,692
Reserve for impaired loans | 14,495 | 17,357
Reserve for non-impaired loans | 154,643 | 161,335
Reserve for off-balance sheet credit commitments | $ 1,734 | $ 3,305

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- Definition Financing Receivable, Allowance For Credit Losses, Net Charge-Offs + References No definition available. + Details
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- Definition Reserve For Off-Balance Sheet Credit Commitments + References No definition available. + Details
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- Definition Reserve To Impaired Loans + References No definition available. + Details
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- Definition Reserve To Non-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=28368275&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=28368275&loc=SL6953423-111524 + Details
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- Definition Amount of direct write-downs of financing receivables charged against the allowance. + 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)(3) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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