What's in the budget for immigration

WHAT'S IN THE BUDGET FOR IMMIGRATION?

* Four Australian immigration detention centres - Perth residential housing, Maribyrnong (VIC) detention centre, Blaxland compound at Villawood (NSW) detention centre - to close saving close to $40 million over four years

* Lease for Wickham Point (NT) centre won't be renewed beyond November 2016

* Brings to 17 number of detention centres closed since 2013

* $55.4 million to Indonesia for assistance for asylum seekers

* Extra $61.5 million for Nauru and Manus Island detention centres

* $12.1 million support for unaccompanied refugee minors over two years.