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Derivative and Other Financial Instruments with Off-Balance Sheet Risks - Summary of derivative financial instruments within the gain on sale of loans in the Condensed Consolidated Statements of Operations (Details 2) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Derivative [Line Items]    
Total derivative financial instruments $ 350 $ (368)
Commitments to extend credit on loans to be held for sale    
Derivative [Line Items]    
Total derivative financial instruments (329) (122)
Mandatory loan sale commitments and TBA MBS trades    
Derivative [Line Items]    
Total derivative financial instruments 679 (209)
Option contracts    
Derivative [Line Items]    
Total derivative financial instruments $ 0 $ (37)