Business combinations in the world of banks and credit unions come with several complex financial reporting and accounting processes. An often-overlooked component of purchase accounting is the ongoing income recognition (Day 2 Accounting) related to mark-to-market values.
Most financial instruments that are marked to fair value have an amortization schedule based on the valuation-date values. The depreciated values are then tested for impairment in the future through various techniques.
However, this is not the case for acquired loan portfolios, where accretion income must be recorded in conjunction with ASC 310-20. In summary, the portfolio must be split between loans with revolving features and those without.