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Employee Benefit Plans (Details Textual) - USD ($)
 1 Months Ended 7 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2015
May. 28, 2015
May. 29, 2014
May. 30, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay   1.00%      
Defined Contribution Plan, Employer Matching Contribution, Percent of Match 25.00%        
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 6.00%        
Defined Contribution Plan, Cost Recognized $ 2,362,000   $ 3,581,000 $ 3,360,000 $ 3,369,000
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax 5,219,000 $ 5,219,000 5,284,000 4,581,000  
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax 711,000 711,000 756,000 834,000  
Defined Benefit Plan, Accumulated Benefit Obligation 26,940,000 26,940,000 26,190,000 23,658,000  
Defined Benefit Plan, Actuarial Gain (Loss)   104,000 1,472,000 1,567,000  
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax   256,000      
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax   45,000      
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Gains (Losses), after Tax 9,410,000 9,410,000 9,562,000 8,494,000  
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax   5,645,000 5,737,000 5,079,000  
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax 426,000 426,000 $ 453,000 $ 498,000  
Forecast [Member]          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax 78,000 78,000      
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax, Total   364,000      
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Gains (Losses), after Tax $ 442,000 $ 442,000