Long-Term Debt -Senior Secured Notes (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013 Senior Secured Notes, due 2018 [Member]	Mar. 31, 2014 Senior Secured Notes, due 2018 [Member]	Jul. 02, 2013 Senior Secured Notes, due 2018 [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Accrued Interest Paid to Lenders					$ 700,000
Write off of Deferred Debt Issuance Cost			2,700,000
Net loss on extinguishments of long-term debt	(5,400,000)	(3,900,000)	(16,700,000)
Extinguishment of Debt, Fees Paid to Lenders					14,000,000
Long-term Debt, stated interest rate				8.00%
Debt, short-term and long-term			325,000,000	325,000,000
Debt Instrument, Repurchased Face Amount					$ 175,000,000
Redemption Premium, percentage of par value					108.00%