I updated a prototype application that I created for extracting information from XBRL-based financial reports submitted to the SEC. It is an Excel spreadsheet application. You can download the application which is contained in this ZIP archive.
Just press the button "Compare all on List" on the "Compare" sheet. What will happen is the application will extract information from 375 financial reports from banks. It takes about 3 minutes to run depending on you Internet connection speed.
What happens is that information for each bank is loaded into a row in the spreadsheet. Notice that there are ZERO ERRORS in the data. The reason for that is that I selected only banks that had no errors in their information.
This is an excellent learning tool if you want to reverse-engineer how to extract information.
Email me if you have any questions.