Quarterly report pursuant to Section 13 or 15(d)

Fair Value, Option, Quantitative Disclosures (Details)

v3.7.0.1
Fair Value, Option, Quantitative Disclosures (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ 15,083 $ 32,085
Fair Value, Option, Credit Risk, Gains (Losses) on Assets 411 110
Available-for-sale Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 298 17
Loans Held-for-Investment, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 44,667 56,326
Fair Value, Option, Credit Risk, Gains (Losses) on Assets 0 0
Loans Held-for-Sale, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 1,859 17,173
Fair Value, Option, Credit Risk, Gains (Losses) on Assets 411 110
Borrowings [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) (31,741) (41,431)
Fair Value, Option, Credit Risk, Gains (Losses) on Liabilities 0 0
Interest Income [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 4,936 20,615
Interest Income [Member] | Available-for-sale Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) (1,704) 1
Interest Income [Member] | Loans Held-for-Investment, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 31,628 32,771
Interest Income [Member] | Loans Held-for-Sale, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 398 7,202
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 2,002 16
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments [Member] | Available-for-sale Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 2,002 16
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments [Member] | Loans Held-for-Investment, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 0 0
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments [Member] | Loans Held-for-Sale, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 0 0
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments [Member] | Borrowings [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 0 0
Interest Expense [Member] | Borrowings [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) (25,386) (19,359)
Gain (Loss) on Mortgage Loans [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 1,461 9,971
Gain (Loss) on Mortgage Loans [Member] | Available-for-sale Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 0 0
Gain (Loss) on Mortgage Loans [Member] | Loans Held-for-Investment, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 0 0
Gain (Loss) on Mortgage Loans [Member] | Loans Held-for-Sale, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 1,461 9,971
Gain (Loss) on Mortgage Loans [Member] | Borrowings [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 0 0
Other Income [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 6,684 1,483
Other Income [Member] | Available-for-sale Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 0 0
Other Income [Member] | Loans Held-for-Investment, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 13,039 23,555
Other Income [Member] | Loans Held-for-Sale, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 0 0
Other Income [Member] | Borrowings [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ (6,355) $ (22,072)