Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Schedule of InterBank Acquired Impaired Loans Accounted for Under FASB ASC 310-30 (Details) (InterBank, USD $) In Thousands, unless otherwise specified	Apr. 27, 2012
FASB ASC 310-30 Loans
Loans Impaired Acquired	$ 4,363
Total covered assets	4,363
FASB ASC 310-30 by Policy Loans
Loans Impaired Acquired	281,095
Total covered assets	281,095
Other Acquired Impaired Loans
Foreclosed Assets Impaired Acquired	6,216
Estimated Loss Reimbursement From the FDIC	83,989
Total covered assets	90,205
Total Acquired Impaired Loans
Loans Impaired Acquired	285,458
Foreclosed Assets Impaired Acquired	6,216
Estimated Loss Reimbursement From the FDIC	83,989
Total covered assets	$ 375,663