Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Other / Unknown; Human-Machine Interface
Deviation - Altitude Overshoot; Deviation - Altitude Crossing Restriction Not Met; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented
Environment - Non Weather Related; Human Factors
We were assigned a descent to 17;000 feet then given a descend via clearance for the ZZZZZ arrival into ZZZ. The hard altitude was selected in the altitude preselect before altitude was captured. This allowed the aircraft to descend below the bottom of ZZZZZ at 17;000 [feet]. The First Officer noticed the deviation moments before ATC queried us to ensure the proper clearance was issued. We were at 15;500 feet so the First Officer; Pilot Flying (PF); leveled off and held the altitude until ZZZZZ; as we were only a few miles from ZZZZZ at the time.Cause - I; Pilot Monitoring (PM); was distracted doing other tasks in preparation for landing and neglected my PM duties. An additional factor was this was my first trip working since the end of April. My PM and scanning skills had been a little rusty.
Air carrier Captain reported an altitude deviation citing distraction and not working for several months as contributing factors.