Who said you can never go home again? For Dublin-born singer-guitarist Dave King of Irish-American punk rockers Flogging Molly, all it took was a little help from his eventual wife and bandmate, violinist Bridget Regan.

"When I heard Bridget playing the fiddle, it brought out a lot of feelings in me," King said through a bright and friendly Irish brogue during a phone interview.

"I wanted to take that feeling and go back home - not physically, of course. It just seemed to all fall together for me."

A lilting mix of traditional Celtic sounds - fiddle, banjo, accordion, tin whistle and uillean pipes - floating over punk riffs and backbeats? You could say there isn't anything "traditional" about Flogging Molly, who will play a show at Boise's Knitting Factory that sold out in advance.

With no help from a major label and relentless touring - King calls the band's 200 tour dates in 2007 a light year - Flogging Molly's fourth studio record, "Float," dropped back in March after recording sessions in Ireland. The result is fun and diverse, with plenty of longing for home.

"We're really happy with it. Recording in Ireland was very direct and very positive, and it definitely focused us on what we were doing."

Leaving his native land at age 17 in the late 1970s, King adjusted to his new country without a U.S. Permanent Resident Card - which left him incapable of going home for eight years.

"For whatever reason, I think I blocked out a huge portion of my life in Ireland as a kid, and I was just working to find my feet in America," he said.

He eventually carved out a niche and found modest success in various hard-rock bands.

But something was missing.

"Everything that you're involved in, no matter what it is, growing up and playing music - hopefully the good bits stick," King said of his influences. "I think it all happened for a reason."

Over time, Flogging Molly's sound took shape. With a seven-piece group of multi-instrumentalists - the current lineup also features Dennis Casey, Matt Hensley, Nathan Maxwell, Bob Schmidt and George Schwindt - Flogging Molly honed their chops at famed L.A. pub Molly Malone's, from which they culled their name.

"When you come to see us, you definitely see that playing live is the spirit of Flogging Molly," King said. "There is a bit of a celebration in a sense. A band like us, with fiddles and accordion, seeing the reaction on peoples' faces is really wonderful. Touring has been such a huge part of our lives."

Touring this year will take the band from the United States to Japan, Australia and through Europe.

"We don't try and rehash anything, taking old Irish songs and bashing them to death," King said. "Flogging Molly definitely has its own vibe going on, but there's absolutely nothing wrong with influence. You wouldn't be doing what you're doing unless you have them.

"If the mix is right, it'll sound good and taste good."

Just like home.