Loans (Summary Of Troubled Debt Restructuring By Concessions Made Types) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Troubled debt restructuring loans	$ 28,200	$ 26,100
Accrual Loan
Number of contracts	45	39
Troubled debt restructuring loans	22,970	17,951
Accrual Loan | Forbearance of Interest
Number of contracts	3	1
Troubled debt restructuring loans	2,092	311
Accrual Loan | Forgiveness of Principal
Number of contracts	4	2
Troubled debt restructuring loans	1,897	902
Accrual Loan | Payment Modification Only
Number of contracts	1	1
Troubled debt restructuring loans	91	92
Accrual Loan | Rate Reduction Only
Number of contracts	8	7
Troubled debt restructuring loans	6,141	4,192
Accrual Loan | Rate Reduction, Forbearance of Interest
Number of contracts	12	14
Troubled debt restructuring loans	8,292	9,347
Accrual Loan | Rate Reduction, Forbearance of Principal
Number of contracts	16	14
Troubled debt restructuring loans	4,401	3,107
Accrual Loan | Rate Reduction, Payment Modification
Number of contracts	1
Troubled debt restructuring loans	56
Non-Accrual Loans
Number of contracts	10	11
Troubled debt restructuring loans	5,170	8,155
Non-Accrual Loans | Forgiveness of Principal
Number of contracts		1
Troubled debt restructuring loans		136
Non-Accrual Loans | Payment Modification Only
Number of contracts	1	1
Troubled debt restructuring loans	251	307
Non-Accrual Loans | Rate Reduction Only
Number of contracts	4	4
Troubled debt restructuring loans	929	1,145
Non-Accrual Loans | Rate Reduction, Forbearance of Interest
Number of contracts	4
Troubled debt restructuring loans	2,891
Non-Accrual Loans | Rate Reduction, Forbearance of Principal
Number of contracts	1	1
Troubled debt restructuring loans	1,099	1,123
Non-Accrual Loans | Rate Reduction, Payment Modification
Number of contracts		4
Troubled debt restructuring loans		$ 5,444