Loans And Allowance For Probable Loan Losses (Recorded Investment In Loans Modified In TDRs) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Financing Receivable, Modifications [Line Items]
Recorded Investment in Loans Modified in Trouble Debt Restructuring	$ 13,613	$ 18,293
Residential Construction [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment in Loans Modified in Trouble Debt Restructuring	551	605
Lot And Land Development [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment in Loans Modified in Trouble Debt Restructuring	662	4,927
1-4 Family [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment in Loans Modified in Trouble Debt Restructuring	4,932	7,690
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment in Loans Modified in Trouble Debt Restructuring	6,812	4,574
Commercial Loans
Financing Receivable, Modifications [Line Items]
Recorded Investment in Loans Modified in Trouble Debt Restructuring	$ 656	$ 497