Loss Sharing Agreements and FDIC Indemnification Assets: Schedule of Carrying Amount of Assets Covered by Loss Sharing Agreement Accoucnted for in FASB ASC 310-30 (Details) (USD $) In Thousands, unless otherwise specified	Apr. 27, 2012
InterBank Loans
FASB ASC 310-30 Loans	$ 4,363
FASB ASC 310-30 by Policy Loans	281,095
Total Assets Covered by Loss Sharing Agreement	285,458
InterBank Foreclosed Assets
Other Assets Carrying Amount	6,216
Total Assets Covered by Loss Sharing Agreement	6,216
InterBank estimated loss reimbursement from the FDIC
Other Assets Carrying Amount	83,989
Total Assets Covered by Loss Sharing Agreement	83,989
InterBank total covered assets
FASB ASC 310-30 Loans	4,363
FASB ASC 310-30 by Policy Loans	281,095
Other Assets Carrying Amount	90,205
Total Assets Covered by Loss Sharing Agreement	$ 375,663