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Troubled Debt Restructurings, by Type of Loan Modification (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2013 | Dec. 31, 2012
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment | $ 199 | $ 5,406 | $ 8,467
Consumer Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment | 20 | 284 | 1,714
Commercial and Industrial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment | 50 | 1,507 | 1,285
Small Business Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment | 0 | 0 | 675
Real Estate Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment | 129 | 3,615 | 4,793
Real Estate Loans | 1-4 Family - closed end |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment | 129 | 3,368 | 1,351
Real Estate Loans | Equity Lines |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  |  | 29
Real Estate Loans | Commercial real estate - owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment | 0 | 0 | 2,190
Real Estate Loans | Commercial real estate - non-owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment | 0 | 0 | 390
Real Estate Loans | Other construction/Land |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment | 0 | 247 | 833
Rate Modification |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate Modification | Consumer Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate Modification | Commercial and Industrial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate Modification | Small Business Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate Modification | Real Estate Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate Modification | Real Estate Loans | 1-4 Family - closed end |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate Modification | Real Estate Loans | Equity Lines |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  |  | 0
Rate Modification | Real Estate Loans | Commercial real estate - owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate Modification | Real Estate Loans | Commercial real estate - non-owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate Modification | Real Estate Loans | Other construction/Land |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Term Modification |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 5,376 | 4,289
Term Modification | Consumer Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 284 | 1,328
Term Modification | Commercial and Industrial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 1,507 | 625
Term Modification | Small Business Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 200
Term Modification | Real Estate Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 3,585 | 2,136
Term Modification | Real Estate Loans | 1-4 Family - closed end |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 3,338 | 313
Term Modification | Real Estate Loans | Equity Lines |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  |  | 29
Term Modification | Real Estate Loans | Commercial real estate - owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 1,006
Term Modification | Real Estate Loans | Commercial real estate - non-owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 330
Term Modification | Real Estate Loans | Other construction/Land |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 247 | 458
Interest-Only Modification |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 2
Interest-Only Modification | Consumer Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Interest-Only Modification | Commercial and Industrial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 2
Interest-Only Modification | Small Business Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Interest-Only Modification | Real Estate Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Interest-Only Modification | Real Estate Loans | 1-4 Family - closed end |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Interest-Only Modification | Real Estate Loans | Equity Lines |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  |  | 0
Interest-Only Modification | Real Estate Loans | Commercial real estate - owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Interest-Only Modification | Real Estate Loans | Commercial real estate - non-owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Interest-Only Modification | Real Estate Loans | Other construction/Land |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate & Term Modification |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 30 | 3,221
Rate & Term Modification | Consumer Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 269
Rate & Term Modification | Commercial and Industrial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 658
Rate & Term Modification | Small Business Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 475
Rate & Term Modification | Real Estate Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 30 | 1,819
Rate & Term Modification | Real Estate Loans | 1-4 Family - closed end |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 30 | 200
Rate & Term Modification | Real Estate Loans | Equity Lines |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  |  | 0
Rate & Term Modification | Real Estate Loans | Commercial real estate - owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 1,184
Rate & Term Modification | Real Estate Loans | Commercial real estate - non-owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 60
Rate & Term Modification | Real Estate Loans | Other construction/Land |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 375
Rate & Interest-Only Modification |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate & Interest-Only Modification | Consumer Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate & Interest-Only Modification | Commercial and Industrial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate & Interest-Only Modification | Small Business Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate & Interest-Only Modification | Real Estate Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate & Interest-Only Modification | Real Estate Loans | 1-4 Family - closed end |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate & Interest-Only Modification | Real Estate Loans | Equity Lines |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  |  | 0
Rate & Interest-Only Modification | Real Estate Loans | Commercial real estate - owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate & Interest-Only Modification | Real Estate Loans | Commercial real estate - non-owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate & Interest-Only Modification | Real Estate Loans | Other construction/Land |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Term & Interest-Only Modification |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 222
Term & Interest-Only Modification | Consumer Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Term & Interest-Only Modification | Commercial and Industrial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Term & Interest-Only Modification | Small Business Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Term & Interest-Only Modification | Real Estate Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 222
Term & Interest-Only Modification | Real Estate Loans | 1-4 Family - closed end |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 222
Term & Interest-Only Modification | Real Estate Loans | Equity Lines |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  |  | 0
Term & Interest-Only Modification | Real Estate Loans | Commercial real estate - owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Term & Interest-Only Modification | Real Estate Loans | Commercial real estate - non-owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Term & Interest-Only Modification | Real Estate Loans | Other construction/Land |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate, Term & Interest-Only Modification |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 733
Rate, Term & Interest-Only Modification | Consumer Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 117
Rate, Term & Interest-Only Modification | Commercial and Industrial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate, Term & Interest-Only Modification | Small Business Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate, Term & Interest-Only Modification | Real Estate Loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 616
Rate, Term & Interest-Only Modification | Real Estate Loans | 1-4 Family - closed end |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 616
Rate, Term & Interest-Only Modification | Real Estate Loans | Equity Lines |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  |  | 0
Rate, Term & Interest-Only Modification | Real Estate Loans | Commercial real estate - owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate, Term & Interest-Only Modification | Real Estate Loans | Commercial real estate - non-owner occupied |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | 0 | 0
Rate, Term & Interest-Only Modification | Real Estate Loans | Other construction/Land |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding, Recorded Investment |  | $ 0 | $ 0

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