ORIGINAL: muzzyman88
I'd start by doing what bigcountry said and twist or untwist one side of the yoke cable to get it squared up again. I'm not familiar with Martin's strings but some manufacturers have a free floating yoke cable that helps compensate for this sort of thing.
One issue that arises when you twist or untwist yokes is that you'll never get it correct undrawn and drawn. If you get it squared while the bow is at full draw, it won't be square when you let down on the bow, or vise versa.
Sometimes, you can get the idler perfect. Depends on the limbs and cam design. All my older bows that were 40" or longer, with dual cable and split buss cables, I could. I am finding newer shorter bows are more difficult.
Spot hogg recommends you split the difference on the idler wheel.