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Note 5 - Loans (Details) - Allowance for Loan Losses by Portfolio Segment (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Provision for possible credit losses | $ (2,122) | $ 10,668 | $ 10,385
Charge-offs | (20,442) | (32,791) | (77,626)
Recoveries | 14,009 | 18,127 | 11,407
Commercial Loans Member |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Beginning Balance | 66,101 | 65,658 | 63,918
Provision for possible credit losses | 11,888 | 16,201 | 11,711
Charge-offs | (15,625) | (17,707) | (11,745)
Recoveries | 2,739 | 1,949 | 1,774
Net charge-offs | (12,886) | (15,758) | (9,971)
Ending Balance | 65,103 | 66,101 | 65,658
Reserve for impaired loans | 2,519 | 1,467 | 3,336
Reserve for non-impaired loans | 62,584 | 64,634 | 62,322
Reserve for off-balance sheet credit commitments | 909 | 837 | 816
Real Estate Construction Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Beginning Balance | 23,017 | 21,749 | 43,262
Provision for possible credit losses | (13,302) | (3,720) | 11,514
Charge-offs |  | (1,165) | (37,500)
Recoveries | 2,284 | 6,153 | 4,473
Net charge-offs | 2,284 | 4,988 | (33,027)
Ending Balance | 11,999 | 23,017 | 21,749
Reserve for impaired loans | 3,460 | 8,158 |
Reserve for non-impaired loans | 8,539 | 14,859 | 21,749
Reserve for off-balance sheet credit commitments | 304 | 390 | 1,103
Commercial Mortgage Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Beginning Balance | 82,473 | 108,021 | 128,348
Provision for possible credit losses | (2,500) | (23,128) | 1,454
Charge-offs | (3,945) | (11,762) | (26,750)
Recoveries | 8,725 | 9,342 | 4,969
Net charge-offs | 4,780 | (2,420) | (21,781)
Ending Balance | 84,753 | 82,473 | 108,021
Reserve for impaired loans | 6,584 | 1,336 | 2,969
Reserve for non-impaired loans | 78,169 | 81,137 | 105,052
Reserve for off-balance sheet credit commitments | 111 | 98 | 113
Residential Mortgage And Equity Lines Member |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Beginning Balance | 11,703 | 10,795 | 9,668
Provision for possible credit losses | 924 | 2,360 | 2,392
Charge-offs | (872) | (2,132) | (1,456)
Recoveries | 250 | 680 | 191
Net charge-offs | (622) | (1,452) | (1,265)
Ending Balance | 12,005 | 11,703 | 10,795
Reserve for impaired loans | 721 | 1,222 | 1,247
Reserve for non-impaired loans | 11,284 | 10,481 | 9,548
Reserve for off-balance sheet credit commitments | 34 | 34 | 34
Installment And Other Loans Member |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Beginning Balance | 28 | 57 | 35
Provision for possible credit losses | (10) | (7) | 197
Charge-offs |  | (25) | (175)
Recoveries | 11 | 3 |
Net charge-offs | 11 | (22) | (175)
Ending Balance | 29 | 28 | 57
Reserve for impaired loans |  | 0 |
Reserve for non-impaired loans | 29 | 28 | 57
Reserve for off-balance sheet credit commitments | 1 | 3 | 3
Total [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Beginning Balance | 183,322 | 206,280 | 245,231
Provision for possible credit losses | (3,000) | (8,294) | 27,268
Charge-offs | (20,442) | (32,791) | (77,626)
Recoveries | 14,009 | 18,127 | 11,407
Net charge-offs | (6,433) | (14,664) | (66,219)
Ending Balance | 173,889 | 183,322 | 206,280
Reserve for impaired loans | 13,284 | 12,183 | 7,552
Reserve for non-impaired loans | 160,605 | 171,139 | 198,728
Reserve for off-balance sheet credit commitments | $ 1,359 | $ 1,362 | $ 2,069

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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 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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