Magento get custom-option detail data of a product

 foreach ($_options as $_option) {
		$option_type = $_option->getType();
		if ($option_type == 'drop_down' || $option_type == 'checkbox') {
			$values = $_option->getValues();
			foreach ($values as $key=> $val) {
			    var_dump($val->getData());
			}
		} else {
			var_dump($_option->getData());				
		}
    }