(Assumptions Used) (Details) (Pension Benefits [Member])	4 Months Ended		12 Months Ended
	Apr. 30, 2013		Dec. 31, 2012
Pension Benefits [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	4.00%	[1]	4.00%	[1]
Rate of compensation increase	4.00%	[1]	4.00%	[1]
Expected long-term rate of return on plan assets	7.50%	[1]	7.50%	[1]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	4.00%	[1]	4.50%	[1]
Expected long-term rate of return on plan assets	7.50%	[1]	7.75%	[1]
Rate of compensation increase	4.00%	[1]	4.00%	[1]

[1] This calculation was performed as of April 30, 2013 due to the pension freeze and we are not otherwise required to perform the calculation at interim periods