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Employee Benefit Plans (Detail Textuals) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]      
Settlement cost $ 1,702   $ 1,702
401(k) retirement savings plan      
Defined Benefit Plan Disclosure [Line Items]      
Contribution percentage     3.00%
Maximum additional discretionary contribution percentage     4.00%
Domestic noncontributory defined benefit pension plan      
Defined Benefit Plan Disclosure [Line Items]      
Pension curtailment gain   $ 6,822