FORT WORTH, Texas, March 22, 2013 (GLOBE NEWSWIRE) -- Quicksilver Resources Inc. (NYSE:KWK) announced today the company has filed its 2012 Form 10-K. Net income for the fourth quarter and full-year 2012 as reported today in the company's selected financial information is higher than that reported in the press release issued February 25, 2013. During the preparation of the 2012 financial statements, the company determined that certain hedges did not qualify for hedge accounting at their designation dates. Consequently, the unrealized gains and losses on these derivatives since their designation have been recognized in earnings rather than deferred through other comprehensive income. Further, this treatment disqualifies their inclusion in the computation of the full-cost ceiling. The ceiling impairments also had an effect on the depletion rate in subsequent quarters. All of these factors caused a change in the company's results before income tax and the resulting tax provision. The company also recognized a valuation allowance for its Canadian net deferred tax assets. The company has retroactively applied the revised accounting treatment for these derivatives, which resulted in restatements in each quarter of 2012 to revenue, impairment, and income taxes; DD&A was restated in the second, third, and fourth quarters of 2012. The restatement also affects the balance sheet for property, plant, and equipment, deferred taxes, AOCI and retained earnings. Details of these changes, including their cash flow effects, are included in the tables following this press release. All adjustments described above are non-cash. The company is not filing amended quarterly reports on Form 10-Q for each of the interim quarters for 2012 as restated quarterly results are included within the 2012 annual report along with accompanying disclosures. A more complete explanation of the restatement is also included in the foreword to the MD&A section of the 2012 10-K filed today.