However, operating income of $289.4 million surged 7.0% from the second quarter of 2011. Distributable Cash Flow Energy Transfer Partners reported distributable cash flows of $275.3 million in the quarter, up from $223.3 million in the prior-year quarter. Capital Expenditure During the quarter, maintenance capital expenditure totaled $30.4 million, up 3.1% year over year. Balance Sheet As of June 30, 2012, Energy Transfer had long-term debt (less current maturities) of $9,043.4 million. Debt-to-capitalization ratio was 55.2%. Acquisition In late May, Energy Transfer Partners entered into an agreement to acquire Philadelphia-based refining and petroleum product marketing company Sunoco Inc. (:SUN) for $5.3 billion. As per the terms of the agreement, Sunoco shareholders will get $50.13 in cash or stock for each share they hold. The deal has been approved by the board of directors of both the companies and is expected to close by the latter half of 2012.