Richie was a character that had appeared several times on The Rockford Files, and seemed meant to be part Jim Rockford and part Fletch. Brockleman was always one step ahead of his creditors, had a somewhat combative relationship with a police Sergeant, and cool, but somewhat battered car (a vintage Mustange, if I remember correctly).
It was a fairly fun and breezy show, and Dennis was very good in the role, but the show could have used sharper writing. Steven Bochco had an early job writing the series, and in just a few years would create the first of the 80s-90s wave of cop dramas, Hill Street Blues. Steven's wife, Barbra Bosson also had a role.