Post-Retirement Benefit Plans (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Post Retirement Benefit Plans [Line Items]
Compensation rate increase	3.00%	3.00%	3.00%
Discount rate	2.03%	1.49%	3.25%
Employee turn-over	Actuarial standard and average of the last 5 years	Actuarial standard and average of the last 5 years	Actuarial standard and average of the last 5 years
Average age of retirement	60 to 65 years actuarial standard based on age and professional status	60 to 65 years actuarial standard based on age and professional status	60 to 65 years actuarial standard based on age and professional status