Fair Values of Assets and Liabilities (Details 1)	Jun. 30, 2012 Basis_Points
Maximum [Member]
Valuation assumption ranges for MSRs
Expected prepayment	31.00%
Discount rate	14.00%
Valuation assumption ranges for derivative commitments
Expected loan close rate	100.00%
Inherent MSR value (basis points per loan)	198
Minimum [Member]
Valuation assumption ranges for MSRs
Expected prepayment	14.00%
Discount rate	10.00%
Valuation assumption ranges for derivative commitments
Expected loan close rate	4.00%
Inherent MSR value (basis points per loan)	10
Average [Member]
Valuation assumption ranges for MSRs
Expected prepayment	22.00%
Discount rate	10.00%
Valuation assumption ranges for derivative commitments
Expected loan close rate	75.00%
Inherent MSR value (basis points per loan)	101