These quality businesses currently offer dividend yields of 3% or better.The S&P 500 has surged to new highs recently, but some of the strongest companies that pay regular dividends are trading well off their highs. This has pushed their dividend yields up and signals they might be undervalued.Here are two top dividend stocks to buy for the long term.1. Realty IncomeRealty Income (O 2.00%) is a top real estate investment trust (REIT) that has a 55-year record of paying dividends to investors. As a REIT, it ...