While Chris Daughtry's music career is on the upswing, he apparently feels the show mainly responsible for his success is heading in the opposite direction.

"I feel like it's definitely lacking some credibility at this point," the former American Idol fifth-season finalist told Rolling Stone in an interview published Monday.  "It's in a state of decline and if they don't do something about it, it's probably not gonna last too much longer. I'm sure that'll be used against me, but that's the truth, you know?"

Daughtry attributed part of Idol's problem on the terrible talent highlighted during the show's audition episode broadcasts that begin every season.

"People get tired of seeing people that suck," he told Rolling Stone.  "It's funny at first, but come on. They spend three weeks on people that can't sing, and that's what they're banking it on. [They should] find some people that you can really invest in."

In addition, he said after six installments and a seventh edition -- which will premiere Tuesday, January 15 at 8PM ET/PT on Fox -- the lack of interested participants could also be hurting Idol.

"After going for so long, who else is out there that still wants to get on the show?" Daughtry wondered aloud to Rolling Stone.

Daughtry has been riding high in recent weeks, as his band took home 2007 American Music Awards in November for Favorite Adult Contemporary Artist and Favorite Breakthrough Artist -- while the group's self-titled debut album was also recognized for Favorite Pop or Rock Album.

A few weeks later, Daughtry received three Grammy Award nominations. The group's self-titled debut was nominated for Best Rock Album; one of its singles -- "It's Over You" -- received a nod in the Best Rock Song category; and "Home" received a nod in the Best Pop Performance By A Duo Or Group With Vocals category.  Last week, "Home" won the People's Choice Award for Favorite Rock Song.

The band's self-titled debut has sold 3.6 million copies since its release last November, making them one of Nielsen's Top 10 selling artists of 2007, according to Rolling Stone.

However not all former Idol finalists are meeting the same success.  Idol fifth-season champ Taylor Hicks and runner-up Katharine McPhee, as well as second-season winner Ruben Studdard, have all departed from the Sony BMG recording family in recent weeks.

Daughtry and his band are currently recording their second album, Rolling Stone reported.