Employee Benefit Plans (Details 3)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Pension Plans [Member]
Weighted average assumptions to measure the benefit obligation
Discount rate	3.60%	4.20%
Expected long-term return on plan assets	7.20%	7.20%
Post-Retirement Benefit Plans [Member]
Weighted average assumptions to measure the benefit obligation
Discount rate	3.80%	4.10%