Acquired and Covered Loans (Details) - Acquired Loans - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Note 5 - Acquired Loans (Details) - Acquired Loans [Line Items]
Renewed non-purchased credit impaired loans	$ 54,800
PCI	66,011	$ 83,394
Non-Purchased impaired loans	606,306	739,589
Total	672,317	822,983
Acquired loans
Note 5 - Acquired Loans (Details) - Acquired Loans [Line Items]
PCI	30,895	28,712
Non-Purchased impaired loans	583,505	714,836
Total	614,400	743,548
Covered Loans
Note 5 - Acquired Loans (Details) - Acquired Loans [Line Items]
PCI	35,116	54,682
Non-Purchased impaired loans	22,801	24,753
Total	$ 57,917	$ 79,435