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Supplemental Disclosures of Cash Flow Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Cash payments for:    
Interest $ 488 $ 696
Taxes 159 0
Noncash investing activities:    
Transfers from loans to real estate acquired through foreclosure $ 352 $ 358