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Supplemental Disclosures of Cash Flow Information (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Cash payments for:    
Interest $ 1,420 $ 2,200
Taxes 427 794
Noncash investing activities:    
Transfers from loans to real estate acquired through foreclosure $ 680 $ 467