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Note 14 - Commitments and Contingencies (Detail) - Financial Instruments with Off-Balance Sheet Risk (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Other Commitments | $ 1,856,285 | $ 1,753,019
Commitments to Extend Credit [Member] |  |
Other Commitments | 1,740,463 | 1,626,523
Standby Letters of Credit [Member] |  |
Other Commitments | 44,672 | 62,076
Commercial Letters of Credit [Member] |  |
Other Commitments | 71,073 | 64,233
Bill Of Lading Guarantees Member |  |
Other Commitments | $ 77 | $ 187

X
- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
Name: | us-gaap_OtherCommitment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant