This is an old article, but it seems like the details should still apply:
http://unitedstatesofhockey.com/2011/12/20/nhl-network-becomes-exclusive-tv-home-for-world-junior-championship-in-u-s-through-2018/
I'm always excited for this tournament. I make sure to save enough vacation days so that I can stay home and watch as many games as I can.