It was widely reported for years after the story broke in 2008. The reason for it being an on going story is that it forced both Liechtenstein and Switzerland to change their banking laws and practices to a point where anonymous wealth management is not only non existent in Switzerland anymore, but they had a deadline to clean up the existing accounts too.
The Germans are not even trying to deny any longer the involvement of their intelligence apparatus in the scandal or the fact they bought the info from a bank employee. The complete disregard for how far they pushed the envelope under their own jurisdiction to make the essentially illegally obtained evidence admissible and the sharing of the info with other countries signalled they meant business and scared the Swiss into submission.
Even Wikipedia has an article on it:
https://en.wikipedia.org/wiki/2008_L...ein_tax_affair
Although I remember better articles and analysis from FT and Der Spiegel at the time.
This Panama thing is Very similar, with German newspaper being very much at the center of both cases (initially the 2008 thing was also reported of being the work of investigating reporters).
Anyway the info is being shared internationally and the local news are having a field day over here (especially because Putin's name is apparently on the list being shared).