Is Phil Robertson Quitting Duck Dynasty?

Is the patriarch of the "Duck Dynasty" family quitting the show? The Robertson guys were interviewed for Parade Magazine recently and in the article Phil Robertson says he is planning on walking away from the show soon, but he doesn't think his departure would signal the end of its run. He says, quote, "I think it'll go on without me." He didn't say specifically when he might hang it up but we can assume that he'll still be heavily involved on season four which premieres on August 14th.