Loans (Summary Of Troubled Debt Restructurings By Collateral Types) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Troubled debt restructuring loans	$ 23,300	$ 26,100
Accrual Loan
Number of contracts	51	39
Troubled debt restructuring loans	19,893	17,951
Accrual Loan | Warehouse [Member]
Number of contracts	3
Troubled debt restructuring loans	1,621
Accrual Loan | Raw Land [Member]
Number of contracts	2	3
Troubled debt restructuring loans	1,349	1,549
Accrual Loan | Hotel & Motel [Member]
Number of contracts	3	1
Troubled debt restructuring loans	2,362	503
Accrual Loan | Office [Member]
Number of contracts	2	3
Troubled debt restructuring loans	1,503	1,077
Accrual Loan | Retail including Strip Centers [Member]
Number of contracts	7	9
Troubled debt restructuring loans	4,054	6,694
Accrual Loan | 1-4 Family Residential [Member]
Number of contracts	30	22
Troubled debt restructuring loans	8,216	6,781
Accrual Loan | Inventory [Member]
Number of contracts	1
Troubled debt restructuring loans	450
Accrual Loan | Equipment [Member]
Number of contracts	1
Troubled debt restructuring loans	38
Accrual Loan | Unsecured [Member]
Number of contracts	2
Troubled debt restructuring loans	300
Accrual Loan | Apartments [Member]
Number of contracts		1
Troubled debt restructuring loans		1,347
Non-Accrual Loans
Number of contracts	3	11
Troubled debt restructuring loans	3,390	8,155
Non-Accrual Loans | Raw Land [Member]
Number of contracts		2
Troubled debt restructuring loans		618
Non-Accrual Loans | Hotel & Motel [Member]
Number of contracts		1
Troubled debt restructuring loans		2,072
Non-Accrual Loans | Office [Member]
Number of contracts	1
Troubled debt restructuring loans	2,770
Non-Accrual Loans | Retail including Strip Centers [Member]
Number of contracts		1
Troubled debt restructuring loans		2,665
Non-Accrual Loans | 1-4 Family Residential [Member]
Number of contracts	2	7
Troubled debt restructuring loans	$ 620	$ 2,800