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9) Other Business Activity (Details) (USD $)
 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Mortgages originated and sold $ 1,034,903,000 $ 570,664,000
Amount available to originate loans under this agreement 55,000,000  
Mortgage loans in which settlements with third party investors were still pending $ 165,347,000