Loans (Summary Of Troubled Debt Restructuring By Concessions Made 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 | Forbearance of Interest
Number of contracts	2	1
Troubled debt restructuring loans	1,902	311
Accrual Loan | Forgiveness of Principal
Number of contracts	3	2
Troubled debt restructuring loans	1,516	902
Accrual Loan | Payment Modification Only
Number of contracts	2	1
Troubled debt restructuring loans	1,292	92
Accrual Loan | Rate Reduction Only
Number of contracts	10	7
Troubled debt restructuring loans	5,889	4,192
Accrual Loan | Rate Reduction, Forbearance of Interest
Number of contracts	15	14
Troubled debt restructuring loans	4,371	9,347
Accrual Loan | Rate Reduction, Forbearance of Principal
Number of contracts	18	14
Troubled debt restructuring loans	4,874	3,107
Accrual Loan | Rate Reduction, Payment Modification
Number of contracts	1
Troubled debt restructuring loans	49
Non-Accrual Loans
Number of contracts	3	11
Troubled debt restructuring loans	3,390	8,155
Non-Accrual Loans | Forgiveness of Principal
Number of contracts	1	1
Troubled debt restructuring loans	369	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
Troubled debt restructuring loans		1,145
Non-Accrual Loans | Rate Reduction, Forbearance of Interest
Number of contracts	1
Troubled debt restructuring loans	2,770
Non-Accrual Loans | Rate Reduction, Forbearance of Principal
Number of contracts		1
Troubled debt restructuring loans		1,123
Non-Accrual Loans | Rate Reduction, Payment Modification
Number of contracts		4
Troubled debt restructuring loans		$ 5,444