ABSTRACT Since the mandate by the U.S. Securities and Exchange Commission (SEC) to begin interactive data reporting in June 2009, according to XBRL Cloud, an XBRL product and service provider, more than 4,000 filing errors have been identified. We examine the overall changing pattern of the errors to understand whether the large number of errors may hamper the transition to interactive data reporting. Using a sample of 4,532 filings that contain 4,260 errors, we document a significant learning curve exhibited by the XBRL filers. Specifically, we find that the number of errors per filing is significantly decreasing when a company files more times, suggesting that the company filers or the filing agents many companies use learn from their experiences and therefore the future filings are improved. Our findings provide evidence to encourage the regulatory body, the filers, and the XBRL technology supporting community to embrace the new disclosure requirement in financial reporting. The significantly decreased error pattern also helps address the information users' concerns regarding the data quality of XBRL filings. Data Availability: Data are publicly available from the sources identified in the study.