In Gaito v. Pennsylvania Board of Probation and Parole, 488 Pa. 397, 412 A.2d 568 (1980), the Pennsylvania Supreme Court held that " time spent in custody pursuant to a detainer warrant shall be credited to a convicted parole violator's original term ... only when the parolee was eligible for and had satisfied bail requirements for the new offense and thus remained incarcerated only by reason of the detainer warrant lodged against him." Id. at 403, 412 A.2d at 571.