Last night, it was reported that the Bears had given Danny Trevathan a three-year contract extension.
At the time, that was the extent of the reporting. Today, however, Ian Rapoport was able to provide further details on the deal, reporting that it's an extension worth up to $24 million:
From NFL Now: The #Bears agreed to terms last night with veteran linebacker and leader Danny Trevathan, and he'll get a 3-year deal worth $21.75M base value and a maximum of $24M. Trevathan gets $14M in guarantees, as Chicago locks up a core piece.