Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUES OF ASSETS AND LIABILITIES - Narrative (Details)

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FAIR VALUES OF ASSETS AND LIABILITIES - Narrative (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans Held-for-sale, Fair Value Disclosure $ 654,087 $ 438,224
Mortgages Held-to-maturity, Fair Value Disclosure 103,741 82,319
Fair Value Measured On Recurring Basis Mortgages Held For Sale [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mortgages Held For Sale Unpaid Principal 628,684 433,760
Difference 25,403 4,464
Loans held for investment    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Difference (9,373) (9,679)
Mortgages Held-to-maturity, Fair Value Disclosure 103,741 82,319
Mortgages Held To Maturity Unpaid Principal 113,114 91,998
90 or more days | Fair Value Measured On Recurring Basis Mortgages Held For Sale [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mortgages Held For Sale Unpaid Principal 72 0
Difference 0 0
Loans held for sale 72 0
90 or more days | Loans held for investment    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Difference (2,408) (2,674)
Mortgages Held-to-maturity, Fair Value Disclosure 13,039 8,408
Mortgages Held To Maturity Unpaid Principal $ 15,447 $ 11,082