Employee Benefit Plans (Details 10)	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan, Information about Plan Assets [Abstract]
Weighted average asset allocations	100.00%	100.00%
U S equity [Member]
Defined Benefit Plan, Information about Plan Assets [Abstract]
Weighted average asset allocations	(34.20%)	(33.60%)
International equity [Member]
Defined Benefit Plan, Information about Plan Assets [Abstract]
Weighted average asset allocations	(26.10%)	(24.40%)
Fixed income [Member]
Defined Benefit Plan, Information about Plan Assets [Abstract]
Weighted average asset allocations	(37.80%)	(41.90%)
Money market/cash/guaranteed investments contract [Member]
Defined Benefit Plan, Information about Plan Assets [Abstract]
Weighted average asset allocations	(1.90%)	(0.10%)