Yep, right from the top, as quoted from Yahoo Finance:

Explained Subramaniam, "Our Portland Oregon hub is running with approximately 65% of the staffing needed to handle its normal volume. This staffing shortage has a pronounced impact on the operations, which results in our teams diverting 25% of the volume that would normally flow through this hub because it simply cannot be processed efficiently to meet our service standards. And in this case the volume that diverted must be rerouted and process, which drives inefficiencies in our operations and in turn higher costs. These inefficiencies included adding Incremental linehaul and delivery routes, meaning more miles driven and higher use of third-party transportation to enable us to bypass Portland entirely. Now that's merely one example."