How long does it take for a bruised and smashed fingernail to heal?

I smashed my thumb closing my bathroom door about 3 weeks ago one night. One of those moments. It hurt like heck but, was not totally crushed. My thumbnail is not fractured and I will not lose the nail but the bruising, blood pooling, under the nail is very unsightly.

Since I will not lose the entire nail, how long might this bruising persist? Does the coagulated blood eventually reabsorb?