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Fair Value of Financial Instruments - Narrative (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Jun. 30, 2016
Schedule of Available-for-sale Securities    
Off-balance sheet commitments $ 523,380 $ 505,163
Securities available for sale | Fair Value, Inputs, Level 3    
Schedule of Available-for-sale Securities    
Financial Instruments Owned $ 1,000 $ 1,000