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Employee Benefit Plans (Detail Textuals) - Pension - USD ($)
9 Months Ended
Sep. 11, 2017
Sep. 30, 2017
Defined Benefit Plan Disclosure    
Percentage of employer match   3.00%
Defined benefit plan contributions by employer percent   6.00%
Contribution to the defined benefit plan for the current plan year $ 1,200,000  
Defined benefit plan, minimum required contribution   $ 842,000