Sure, so good morning Brennan, it's Mike. I'll start and see if Jay wants to add. First on your numerical question, the 249 million would have been amortized over three years. So, we're being amortized over '17, '18 and in '19. But you're absolutely right, because these are awards that we're originally granted '14, '15 and '16. There is a disproportion impact on that 2017 of that 249 million that gets accelerated. So, whether or not get a precise numbers, but round numbers if you think about it as in the ballpark of 50% of that number, you wouldn't be far off. And so basically think of it as, those expense savings for 2017 by not having the amortization expense, we expect to be approximately offset by accruing throughout 2017 for a higher cash mix for the cash awards that will then be paid out in February 2018 based on our performance in 2017. So, that’s why I say net-net, I don’t expect there to be much of an impact in 2017 from the change. Obviously, when you get to the outer years, ultimately, there would be expense savings because the awards that will be issuing in February of 2018, and particular we'll have less deferred more cash, so therefore less expense ultimately in the outer years, but probably no impact in 2017. All on your question on the continued service requirements, importantly, Brennan, a couple of things, first this only applies to the deferred cash awards. It is not applied to the deferred equity awards that have been issued previously. And the deferred equity awards, it's obviously different for different people but tend to be higher, quite a bit higher actually than the deferred cash. So, no, we're not concerned about that having a significant impact on employee turnover. As a result of that is the equity award that people would be walking away from remain quite significant. And I would also would add that the, this doesn't have any impact to our Executive Vice President populations, so the top call it 70 people are not impacted by any of this, it's that pieces is carved out. And then lastly in terms of your point on talent, we continue to see stiff competition for top talent, which is really why we concluded. We needed to make this change now. What's happened Brennan is, we've become a competitive outlier here as the market has basically shifted to a higher percentage of cash over the last several years. So, our mix became an outlier and basically we concluded that this is the time to make that change.