protected function thumbnailName()
    {
    	$file = explode('.', $this->image);

		$fileName = Arr::first($file);
		$fileExt = Arr::last($file);

		return $fileName
    		. ($this->width() ? '_w' . $this->width() : '')
    		. ($this->height() ? '_h' . $this->height() : '')
    		. '.' . $fileExt;
    }