German to English Bus/Financial Insurance

I'm translating a text about the Deutsche Rentenversicherung Knappschaft-Bahn-See. It is talking about the different types of insurance and services offered by the organisation and the administrative effort involved. It includes the text:

"Typisch für die Akten der Rentenversicherung sind umfangreiche Dokumente, langjährige Verläufe und lange Archivierungszeiten. Bei der knappschaftlichen Krankenversicherung müssen vorwiegend Dokumente unterschiedlichster Art wie Anträge, Bewilligungen oder Schriftverkehr gehandhabt werden."

Is this just referring to the general health insurance offered by the Deutsche Rentenversicherung or is it a specific type of insurance? The only hits I get are for miners' insurance, but the text is a lot more general than this and has just given a figure of 5 million insured individuals in Germany.