Long-Term Debt (Senior Unsecured Debt) (Details) (USD $)	3 Months Ended	9 Months Ended			3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013 Senior Unsecured Notes [Member]	Sep. 30, 2013 Senior Unsecured Notes [Member]	Dec. 31, 2012 Senior Unsecured Notes [Member]	Dec. 31, 2007 Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Senior Unsecured Notes amount issued								$ 550,000,000
Debt instrument interest rate								9.50%
Long-term debt			529,281,000	545,776,000			275,000,000
Loss on early extinguishment of long-term debt	$ (8,572,000)	$ (12,100,000)			$ 8,600,000	$ 8,600,000