welcome (someone or something) with open arms
1. To greet someone very happily and eagerly; to give someone a very warm, enthusiastic welcome. When my brother left for the military, he and I didn't really get along too well. Now that he's coming home soon, I can't wait to welcome him with open arms. It was a little intimidating starting a new job at such a large firm, but everyone there welcomed me with open arms.
2. To be very pleased and enthusiastic about something, especially that which is new or unexpected. The president has announced a reversal on his controversial policy, and many people are welcoming the news with open arms.