Studies are always changing in regards to nutrition. Many studies I read pre 2009 stated that post workout was essential to make the most out of the workout. However i'm now reading studies that say that as long as you hit macro goals, then it doesnt really matter when you get them in, except if your exercising multiple times throughout the day and need as much time as possible to replenish glycogen stores (or at least partially replenish).
I shoot for 1.6-1.8g/KG/BW (as i used the metric system) and will rarely ever go above 1.9g/KG/BW as I do a lot of fitness training and excess protein makes you pee heaps (gotta get rid of that urea somehow), and I need that water so I dont get dehydrated (hard to replace fluids while running).
Another important note is that once protein requirements are met, your body will simply break down protein via a process known as deamination in which the amino group (the amino acids) are split from the carbon group and converted into ammonia, the body then converts the ammonia into Urea and you literally pee it out.
Or, for some specific amino acids, this process will instead convert them into glucose and either stored as fat or used as fuel.