Equity

9 Months Ended

Sep. 30, 2011

Equity [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

Note 5 – Equity Transactions

New York Stock Exchange Listing of Common Stock

On March 15, 2011, we completed the transfer of the primary listing for our common stock from the NYSE Amex to the New York Stock Exchange under the symbol “END.”

Common Stock Offering

On March 30, 2011, we completed an underwritten public offering of 11.5 million shares of common stock at a price of $11.00 per common share ($10.34 per common share, net of underwriting discounts) for net proceeds of $118.4 million. On April 20, 2011, we used a portion of the offering proceeds to redeem all $81.25 million of our outstanding 6% Senior Notes.

Series C Convertible Preferred Stock

At September 30, 2011, we had 37,000 shares of Series C Convertible Preferred Stock outstanding, convertible into 4.2 million shares of common stock. The Series C Preferred Stock pays dividends in cash at 4.5% and is convertible into common stock at any time at the option of the preferred stock investors, at a conversion price of $8.75. On April 12, 2011, a holder of a portion of our Series C Convertible Preferred Stock converted 4,000 preferred shares, with a face value of $4 million, into 457,142 shares of our common stock. On July 25, 2011, an additional 4,000 preferred shares of our Series C Convertible Preferred Stock, with a face value of $4 million, were converted by a holder into 457,142 shares of our common stock.