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Fair Value (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Rate Lock Commitments [Member] | NVRM - Other assets [Member]
 
Derivative Assets:  
Rate Lock Commitments $ 809
Forward Sales Contracts [Member] | NVRM - Accounts payable and other liabilities [Member]
 
Derivative Liabilities:  
Forward Sales Contracts $ 1,851