How to differentiate long paraphrasing and original ideas with APA in-text citations?
Use a conditional construction to indicate distance from the cited claim.  E.g., 


  Smith (2011) contends that blah blah blah. Blah blah blah blah blah blah blah. blah blah blah blah blah blah blah blah. If Smith's contention were true, it would follow that monkeys are actually fish.