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Note 7 - Loans (Details) - Allowance for Loan Losses by Portfolio Segment (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Ending Balance | $ 179,733 |  | $ 179,733 |
Beginning Balance |  |  | 183,322 |
Provision for possible credit losses |  |  | (894) | 7,487
Commercial Loans Member |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Ending Balance | 64,379 | 66,595 | 64,379 | 66,595
Beginning Balance | 61,056 | 60,404 | 66,101 | 65,658
Recoveries | 624 | 153 | 1,579 | 899
Net charge-offs | (1,066) | (1,980) | (2,801) | (6,193)
Provision for possible credit losses | 4,389 | 8,171 | 1,079 | 7,130
Charge-offs | (1,690) | (2,133) | (4,380) | (7,092)
Reserve for impaired loans | 1,568 | 3,687 | 1,568 | 3,687
Reserve for non-impaired loans | 62,811 | 62,908 | 62,811 | 62,908
Reserve for off-balance sheet credit commitments | 924 | 747 | 924 | 747
Real Estate Construction Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Ending Balance | 13,755 | 16,360 | 13,755 | 16,360
Beginning Balance | 20,697 | 17,992 | 23,017 | 21,749
Recoveries | 941 | 1,591 | 1,020 | 5,148
Net charge-offs | 941 | 1,340 | 1,020 | 4,022
Provision for possible credit losses | (7,883) | (2,972) | (10,282) | (9,411)
Charge-offs | 0 | (251) | 0 | (1,126)
Reserve for impaired loans | 4,995 | 0 | 4,995 | 0
Reserve for non-impaired loans | 8,760 | 16,360 | 8,760 | 16,360
Reserve for off-balance sheet credit commitments | 273 | 617 | 273 | 617
Commercial Mortgage Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Ending Balance | 89,678 | 99,009 | 89,678 | 99,009
Beginning Balance | 84,816 | 106,175 | 82,473 | 108,021
Recoveries | 3,226 | 5,198 | 3,591 | 7,256
Net charge-offs | 1,185 | 3,740 | 560 | (2,425)
Provision for possible credit losses | 3,677 | (10,906) | 6,645 | (6,587)
Charge-offs | (2,041) | (1,458) | (3,031) | (9,681)
Reserve for impaired loans | 5,342 | 1,896 | 5,342 | 1,896
Reserve for non-impaired loans | 84,336 | 97,113 | 84,336 | 97,113
Reserve for off-balance sheet credit commitments | 1,972 | 104 | 1,972 | 104
Residential Mortgage And Equity Lines Member |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Ending Balance | 11,892 | 10,254 | 11,892 | 10,254
Beginning Balance | 12,091 | 10,122 | 11,703 | 10,795
Recoveries | 64 | 11 | 67 | 377
Net charge-offs | (132) | (539) | (539) | (951)
Provision for possible credit losses | (67) | 671 | 728 | 410
Charge-offs | (196) | (550) | (606) | (1,328)
Reserve for impaired loans | 874 | 1,659 | 874 | 1,659
Reserve for non-impaired loans | 11,018 | 8,595 | 11,018 | 8,595
Reserve for off-balance sheet credit commitments | 33 | 35 | 33 | 35
Installment And Other Loans Member |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Ending Balance | 29 | 56 | 29 | 56
Beginning Balance | 32 | 50 | 28 | 57
Recoveries | 11 |  | 11 | 3
Net charge-offs | 11 |  | 11 | (22)
Provision for possible credit losses | (14) | 6 | (10) | 21
Charge-offs |  |  |  | (25)
Reserve for impaired loans |  | 0 |  | 0
Reserve for non-impaired loans | 29 | 56 | 29 | 56
Reserve for off-balance sheet credit commitments | 1 | 2 | 1 | 2
Total [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Ending Balance | 179,733 | 192,274 | 179,733 | 192,274
Beginning Balance | 178,692 | 194,743 | 183,322 | 206,280
Recoveries | 4,866 | 6,953 | 6,268 | 13,683
Net charge-offs | 939 | 2,561 | (1,749) | (5,569)
Provision for possible credit losses | 102 | (5,030) | (1,840) | (8,437)
Charge-offs | (3,927) | (4,392) | (8,017) | (19,252)
Reserve for impaired loans | 12,779 | 7,242 | 12,779 | 7,242
Reserve for non-impaired loans | 166,954 | 185,032 | 166,954 | 185,032
Reserve for off-balance sheet credit commitments | $ 3,203 | $ 1,505 | $ 3,203 | $ 1,505

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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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