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Note 5 - Loans (Detail) - Activity in the Allowance for Credit Losses (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
(Reversal)/provision for credit losses | $ (5,000) | $ (4,000) | $ 2,000 | $ 9,000 | $ 10,000 | $ 6,000 | $ (9,000) | $ 27,000 | $ 156,900
Transfers from reserve for off-balance sheet credit commitments |  |  |  |  |  |  | 706 | 268 | 2,870
Loans charged off |  |  |  |  |  |  | (32,791) | (77,626) | (138,755)
Recoveries of charged off loans |  |  |  |  |  |  | 18,127 | 11,407 | 12,327
Reserve for Off-Balance Sheet Credit Commitments [Member] | Beginning of Period [Member] |  |  |  |  |  |  |  |  |
Balance |  |  | 2,337 |  |  |  | 2,069 | 2,337 | 5,207
Reserve for Off-Balance Sheet Credit Commitments [Member] | End of Period [Member] |  |  |  |  |  |  |  |  |
Balance |  |  | 2,069 |  |  |  | 1,363 | 2,069 | 2,337
Reserve for Off-Balance Sheet Credit Commitments [Member] |  |  |  |  |  |  |  |  |
(Reversal)/provision for credit losses |  |  |  |  |  |  | (706) | (268) | (2,870)
Beginning of Period [Member] |  |  |  |  |  |  |  |  |
Balance |  |  | 245,231 |  |  |  | 206,280 | 245,231 | 211,889
End of Period [Member] |  |  |  |  |  |  |  |  |
Balance |  |  | $ 206,280 |  |  |  | $ 183,322 | $ 206,280 | $ 245,231

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- Definition Transfers from/to reserve for off balance sheet credit commitments. + 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=7512638&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=7512638&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=7512638&loc=SL6953423-111524 + Details
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- Definition Provision charged for the period based on estimated losses to be realized from loan and lease transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 168, 169, 170 -IssueDate 2006-05-01 -Chapter 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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=6943989&loc=d3e3602-108585 Reference 3: 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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 + Details
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