Marketable Securities (Notes)

12 Months Ended

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

MARKETABLE SECURITIES

MARKETABLE SECURITIES

Our portfolio of marketable securities was comprised of debt securities that were classified as trading securities. Our marketable securities consisted of investments in mortgage-backed securities issued by the Government National Mortgage Association (“GNMA securities”). We reported our trading securities at fair value, using prices provided by independent market participants that are based on observable inputs using market-based valuation techniques (Level 2 of the fair value hierarchy-see Note 5). On August 20, 2012, we sold all of our outstanding GNMA securities with a realized loss of $0.7 million for the year ended December 31, 2012.