"As a natural progression of his involvement in the company for more than 20 years, we understand and respect Dr. Molina's decision, and we thank him for all of his contributions," company chairman Dale Wolf said in a statement. Molina Healthcare also provided a copy of the former director's resignation letter as an exhibit accompanying a filing to the Securities and Exchange Commission. "I have seen the company grow from a single clinic established thirty-seven years ago, by my father Dr. C. David Molina to one of the largest health insurance plans in the nation," Molina wrote in his letter. "The company is a recognized leader in providing care for low-income patients served by the Medicaid and Medicare programs and has established a reputation for excellence." The company's board of directors fired Molina and his brother, former chief financial officer John Molina in May. Wolf said at the time that directors opted for a leadership change out of a desire to improve Molina Healthcare's financial performance.