By the early 1990s, when alternative rock began to experience broad mainstream success, R.E.M. was viewed by subsequent acts such as Nirvana and Pavement as a pioneer of the genre and released its two most commercially successful albums, Out of Time (1991) and Automatic for the People (1992), which veered from the band's established sound. R.E.M.'s 1994 release, Monster, was a return to a more rock-oriented sound. The band began its first tour in six years to support the album; the tour was marred by medical emergencies suffered by three band members. In 1996, R.E.M. re-signed with Warner Bros. for a reported US $80 million, at the time the most expensive recording contract in history. The following year, Bill Berry left the band, while Buck, Mills, and Stipe continued the group as a trio. Through some changes in musical style, the band continued its career into the next decade with mixed critical and commercial success. In 2007, the band was inducted into the Rock and Roll Hall of Fame. R.E.M. disbanded in September 2011, announcing the split on its website.