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Note 7 - Loans (Details) - Allowance for Loan Losses by Portfolio Segment (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Ending Balance | $ 181,452 |  | $ 181,452 |
Beginning Balance |  |  | 183,322 |
Provision for possible credit losses |  |  | (675) | 10,362
Commercial Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Ending Balance | 66,736 | 65,738 | 66,736 | 65,738
Reserve for impaired loans | 10,849 | 1,791 | 10,849 | 1,791
Reserve for non-impaired loans | 55,887 | 63,947 | 55,887 | 63,947
Reserve for off-balance sheet credit commitments | 953 | 801 | 953 | 801
Beginning Balance | 64,379 | 66,595 | 66,101 | 65,658
Provision for possible credit losses | 2,121 | 6,199 | 3,200 | 13,329
Charge-offs | (200) | (7,387) | (4,580) | (14,479)
Recoveries | 436 | 331 | 2,015 | 1,230
Net charge-offs | 236 | (7,056) | (2,565) | (13,249)
Real Estate Construction Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Ending Balance | 16,651 | 16,128 | 16,651 | 16,128
Reserve for impaired loans | 5,691 | 279 | 5,691 | 279
Reserve for non-impaired loans | 10,960 | 15,849 | 10,960 | 15,849
Reserve for off-balance sheet credit commitments | 287 | 668 | 287 | 668
Beginning Balance | 13,755 | 16,360 | 23,017 | 21,749
Provision for possible credit losses | 1,660 | (670) | (8,622) | (10,081)
Charge-offs | 0 | (39) | 0 | (1,165)
Recoveries | 1,236 | 477 | 2,256 | 5,625
Net charge-offs | 1,236 | 438 | 2,256 | 4,460
Commercial Mortgage Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Ending Balance | 86,088 | 92,011 | 86,088 | 92,011
Reserve for impaired loans | 6,129 | 1,729 | 6,129 | 1,729
Reserve for non-impaired loans | 79,959 | 90,282 | 79,959 | 90,282
Reserve for off-balance sheet credit commitments | 799 | 104 | 799 | 104
Beginning Balance | 89,678 | 99,009 | 82,473 | 108,021
Provision for possible credit losses | (5,710) | (6,350) | 935 | (12,937)
Charge-offs | (394) | (966) | (3,425) | (10,647)
Recoveries | 2,514 | 318 | 6,105 | 7,574
Net charge-offs | 2,120 | (648) | 2,680 | (3,073)
Residential Mortgage And Equity Lines Member |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Ending Balance | 11,942 | 10,528 | 11,942 | 10,528
Reserve for impaired loans | 693 | 1,626 | 693 | 1,626
Reserve for non-impaired loans | 11,249 | 8,902 | 11,249 | 8,902
Reserve for off-balance sheet credit commitments | 34 | 34 | 34 | 34
Beginning Balance | 11,892 | 10,254 | 11,703 | 10,795
Provision for possible credit losses | 52 | 740 | 780 | 1,150
Charge-offs | (160) | (477) | (766) | (1,805)
Recoveries | 158 | 11 | 225 | 388
Net charge-offs | (2) | (466) | (541) | (1,417)
Installment And Other Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Ending Balance | 35 | 33 | 35 | 33
Reserve for impaired loans | 0 | 0 | 0 | 0
Reserve for non-impaired loans | 35 | 33 | 35 | 33
Reserve for off-balance sheet credit commitments | 1 | 3 | 1 | 3
Beginning Balance | 29 | 56 | 28 | 57
Provision for possible credit losses | 6 | (23) | (4) | (2)
Charge-offs | 0 | 0 | 0 | (25)
Recoveries | 0 | 0 | 11 | 3
Net charge-offs | 0 | 0 | 11 | (22)
Total [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Ending Balance | 181,452 | 184,438 | 181,452 | 184,438
Reserve for impaired loans | 23,362 | 5,425 | 23,362 | 5,425
Reserve for non-impaired loans | 158,090 | 179,013 | 158,090 | 179,013
Reserve for off-balance sheet credit commitments | 2,074 | 1,610 | 2,074 | 1,610
Beginning Balance | 179,733 | 192,274 | 183,322 | 206,280
Provision for possible credit losses | (1,871) | (104) | (3,711) | (8,541)
Charge-offs | (754) | (8,869) | (8,771) | (28,121)
Recoveries | 4,344 | 1,137 | 10,612 | 14,820
Net charge-offs | $ 3,590 | $ (7,732) | $ 1,841 | $ (13,301)

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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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