Acquired and Covered Loans (Details) - Acquired Loans - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Note 5 - Acquired Loans (Details) - Acquired Loans [Line Items]
PCI	$ 61,913	$ 83,394
Non-Purchased impaired loans	563,709	739,589
Total	625,622	822,983
Renewed non-purchased credit impaired loans	59,200
Acquired loans
Note 5 - Acquired Loans (Details) - Acquired Loans [Line Items]
PCI	32,942	28,712
Non-Purchased impaired loans	541,461	714,836
Total	574,403	743,548
Covered Loans
Note 5 - Acquired Loans (Details) - Acquired Loans [Line Items]
PCI	28,971	54,682
Non-Purchased impaired loans	22,248	24,753
Total	$ 51,219	$ 79,435