Employee Benefit Plans - Schedule of Allocation of Plan Assets (Details)	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Total	100.00%	100.00%
Common collective trusts
Defined Benefit Plan Disclosure [Line Items]
Total	57.00%	59.00%
Corporate bonds (S&P rating of A or higher)
Defined Benefit Plan Disclosure [Line Items]
Total	6.00%	6.00%
Corporate bonds (S&P rating of lower than A)
Defined Benefit Plan Disclosure [Line Items]
Total	13.00%	12.00%
US Treasury and Government
Defined Benefit Plan Disclosure [Line Items]
Total	18.00%	16.00%
Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Total	5.00%	6.00%
Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	1.00%	1.00%