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Condensed Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | --- | ---
Assets: |  |  |
Other assets | $ 1,733 | $ 2,139 |
Total Assets | 459,132 | 438,886 |
Liabilities and Equity: |  |  |
Stockholders' equity | 52,824 | 50,942 |
Total Liabilities and Equity | 459,132 | 438,886 |
Parent Company |  |  |
Assets: |  |  |
Cash and cash equivalents | 236 | 278 | 369
Other assets | 120 | 139 |
Investment in subsidiaries | 52,473 | 50,525 |
Total Assets | 52,829 | 50,942 |
Liabilities and Equity: |  |  |
Accrued expenses | 5 | 0 |
Stockholders' equity | 52,824 | 50,942 |
Total Liabilities and Equity | $ 52,829 | $ 50,942 |

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