Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Millions	3 Months Ended
Jun. 30, 2016	Mar. 31, 2016
Corporate Joint Venture [Member] \| Home Town Residential Mortgage LLC [Member]
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions		49.00%
New Accounting Pronouncement, Early Adoption, Effect [Member]
Increase (Decrease) in Income Taxes	$ 236

The increase (decrease) during the reporting period in the amounts payable to taxing authorities for taxes that are based on the reporting entity's earnings, net of amounts receivable from taxing authorities for refunds of overpayments or recoveries of income taxes, and in deferred and other tax liabilities and assets.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration