Kolkata High court judge impeached

I always thought how people are impeached.

What are the crimes and what sort of posts come under this type of process of removal of people who obtain a very high post, whose fate couldn't be decided at the feat of Judiciary.
Justice Soumitra Sen impeached by Rajya Sabha on corruption charges - The Times of India

Still, don't know the tip-n-toes of this case but a must read for someone who never seen an impeachment proceeding ever. (Coming on NDTV- COURTESY Rajya Sabha TV)
First time ever in India.

'Justice is same for all".

Ok. Impeached!
whom shall we appoint next?
we are having a road side chat and decide on the next candidate.!