Annual report pursuant to Section 13 and 15(d)

Fair Value Fair Value, Option, Quantitative Disclosures - change in balance (Details)

v2.4.0.6
Fair Value Fair Value, Option, Quantitative Disclosures - change in balance (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Fair Value, Option, Quantitative Disclosures [Line Items]        
Mortgage loans held-for-sale, at fair value $ 58,607 $ 5,782 $ 0 $ 0
Loan Held-for-Sale, Mortgages, Unpaid Principal [Member]
       
Fair Value, Option, Quantitative Disclosures [Line Items]        
Mortgage loans held-for-sale, at fair value 56,976 5,655    
Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status 0 0    
Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due 0 0    
Loans Held-for-Sale, Mortgages, Fair Value Adjustment [Member]
       
Fair Value, Option, Quantitative Disclosures [Line Items]        
Mortgage loans held-for-sale, at fair value 58,607 5,782    
Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status 0 0    
Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due $ 0 $ 0