Public entities will apply the new standard for annual periods beginning after December 15, 2016, including interim periods therein. Early adoption is prohibited. Therefore, a calendar year-end public entity would reflect the new standard in its March 31, 2017 first quarter, each subsequent quarter, and also in the year ending December 31, 2017.
Nonpublic entities have an additional year to adopt, i.e., the new standard applies for annual periods beginning after December 15, 2017. In addition, the new standard is effective for interim periods within annual periods that begin after December 15, 2018. Therefore, a calendar year-end nonpublic entity would first apply the new standard for the year ended December 31, 2018. If it also prepares interim financial statements, the new standard would first take affect for those interim periods in 2019.