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