Public Offering of Units and Certain Provisions of the Partnership Agreement (Distribution) (Issuance of Preferred Units) (Details Textuals) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended						1 Months Ended	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2010	Dec. 31, 2010 Preferred Stock [Member]	Dec. 31, 2012 Preferred Stock [Member]	Dec. 31, 2011 Preferred Stock [Member]	Jan. 19, 2010 Preferred Stock [Member]	Feb. 12, 2014 Preferred Unit [Member]	Dec. 31, 2013 Preferred Unit [Member]	Dec. 31, 2012 Preferred Unit [Member]	Dec. 31, 2013 Preferred Unit [Member]	Dec. 31, 2013 Pre Amendment [Member]	Dec. 31, 2013 Post Amendment [Member]
Preferred Units [Line Items]
Preferred Unit Issuance Date			Jan. 19, 2010
EDA exhaustion date	Jan. 03, 2014
Net Proceeds From Issuance Of Preferred Limited Partners Units				$ 120.8
Proceeds from Issuance of Preferred Limited Partners Units				125.0
General Partners' Contributed Capital							2.6
Percentage Of Distribution AllocatedTo General Partner							2.00%
Partners' Capital Account, Units, Sold in Private Placement				14,705,882
Distribution per unit excess distribution level		$ 0.2125
Preferred Units, Cumulative Cash Distributions					$ 14.4	$ 17.2
Preferred Stock, Redemption Price Per Share		$ 13.25
Preferred Stock Dividend Rate Per Dollar Amount Paid In Kind									$ 0.36
Mandatory Redemption Date 2		Dec. 31, 2013
Preferred Stock Paid in kind								452,186		366,260	1,570,806
Preferred Conversion Trading Price		$ 12.75
Preferred Conversion Trading Volume												250,000	215,000