Litigation And Related Matters (Details) (USD $)	3 Months Ended	12 Months Ended						3 Months Ended
	Mar. 31, 2014 site	Dec. 31, 2007	Jan. 16, 2014	Dec. 31, 2013	Nov. 25, 2013	Sep. 30, 2013	Dec. 08, 2011	Mar. 31, 2014 Withdrawal from Multiemployer Defined Benefit Plan [Member]	Mar. 31, 2014 Maximum [Member]	Oct. 31, 2010 Maximum [Member]
Loss Contingencies [Line Items]
Number of landfills listed as superfund site	2
Percentage of site costs Nave agreed to pay		33.33%
Potential environmental liabilities	$ 7,900,000			$ 8,300,000
Recorded amount for probable recoveries	0			0
Claimed amount								15,200,000
Period of dispersal								20 years
Multi-employer pension plan withdrawal liability	$ 7,000,000					$ 7,500,000			$ 10,000,000
Antidumping Duties					8.87%		3.31%			269.00%
Countervailing Duties			0.90%				1.50%