Note 14 - Commitments and Contingencies (Details) - Financial Instruments with Off-Balance Sheet Risk (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other Commitments	$ 1,957,905	$ 1,856,285
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other Commitments	1,858,669	1,740,463
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other Commitments	45,058	44,672
Commercial Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other Commitments	54,098	71,073
Bill Of Lading Guarantees Member
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other Commitments	$ 80	$ 77