Equity and Convertible Debentures Financing - Repurchase of Securities (Details) (USD $)	1 Months Ended			3 Months Ended
	Mar. 31, 2015	Feb. 28, 2015	Jan. 31, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 18, 2013
Equity [Abstract]
Stock Repurchase Program, Authorized Amount						$ 350,000.00
($ in thousands) Value of Shares that May Yet Be Purchased Under the Plan or Program	$ 85,000	$ 85,000	$ 253,000	$ 85,000	$ 256,000
Shares purchased (in shares)	0	75,000	1,600	76,600	1,353
Average Price Paid Per Share	$ 0.00	$ 2.25	$ 2.01	$ 2.25	$ 1.98