Employee Benefit Plans - Summary of Pension Plan Asset Allocations By Asset Category (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Pension plan assets target allocation [Abstract]
Plan asset target percentage	100.00%
Pension plan assets actual allocation [Abstract]
Plan assets actual percentage	100.00%	100.00%
US Equity Securities [Member]
Pension plan assets target allocation [Abstract]
Plan asset target percentage	27.00%
Pension plan assets actual allocation [Abstract]
Plan assets actual percentage	25.00%	30.00%
Non-US Equity Securities [Member]
Pension plan assets target allocation [Abstract]
Plan asset target percentage	39.00%
Pension plan assets actual allocation [Abstract]
Plan assets actual percentage	43.00%	36.00%
Fixed Income Securities [Member]
Pension plan assets target allocation [Abstract]
Plan asset target percentage	30.00%
Pension plan assets actual allocation [Abstract]
Plan assets actual percentage	23.00%	28.00%
Other Mutual Funds
Pension plan assets target allocation [Abstract]
Plan asset target percentage	4.00%
Pension plan assets actual allocation [Abstract]
Plan assets actual percentage	9.00%	6.00%