MURFREESBORO, Tenn. --(Business Wire)-- National Health Investors, Inc. (NYSE: NHI) announced today the pricing of its underwritten public offering of $175 million aggregate principal amount of its 3.25% Convertible Senior Notes due 2021 (the Notes") for net proceeds of approximately $169.3 million, after deducting the underwriting discounts and commissions and other estimated expenses of the off