Pension Plans and Other Postretirement Benefits (Details Textual) - USD ($) $ in Thousands	2 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2006
Pension Plans and Other Postretirement Benefits Additional Textual [Abstract]
Minimum Years of Service Required			1 year
Pension Expense		$ 8,899	$ 11,850	$ 10,295
Health Reimbursement Account Balance		1,896			$ 7,310
Reduction in Expenses Due to Change in Plan			2,980	196
Health Reimbursement Accounts Funding	$ 252	$ 523	$ 252	$ 181
Debt Securities [Member]
Pension Plans and Other Postretirement Benefits Additional Textual [Abstract]
Defined Benefit Plan, Target Allocation Percentage		50% fixed income funds
Equity Securities [Member]
Pension Plans and Other Postretirement Benefits Additional Textual [Abstract]
Defined Benefit Plan, Target Allocation Percentage		50% equity
Qualified Defined Contribution Plan [Member]
Pension Plans and Other Postretirement Benefits Additional Textual [Abstract]
Employer Contribution as Percentage of Eligible Compensation			5.00%
Minimum Years of Service Required			3 years
Employee Vesting Percentage			100.00%
401 K Plan [Member]
Pension Plans and Other Postretirement Benefits Additional Textual [Abstract]
Employee Vesting Percentage		100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		3.00%
Deferred Compensation Arrangement with Individual, Requisite Service Period		5 years
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year, Description		Effective January 1, 2015 the Company began matching each dollar of employee contributions up to a 5% maximum in addition to maintaining the automatic 3% safe harbor contribution.
Defined Benefit Plan [Member]
Pension Plans and Other Postretirement Benefits Additional Textual [Abstract]
Defined Benefit Plan Termination Benefits Terminated Participants Minimum Accrued Lump Sum Values	100
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount	4,200		$ 4,200
Deferred Compensation Arrangement with Individual, Compensation Expense	$ 1,600
Defined Benefit Plan, Future Amortization of Gain (Loss)		$ 1,351
Supplemental Defined Benefit Plans [Member]
Pension Plans and Other Postretirement Benefits Additional Textual [Abstract]
Defined Benefit Plan, Future Amortization of Gain (Loss)		$ 233