v3.6.0.2
Schedule IV - Mortgage Loans on Real Estate (Parenthetical) (Detail)
$ in Billions
Dec. 31, 2016
USD ($)
Mortgage Loans on Real Estate [Abstract]
Tax basis of mortgage loans
$ 8.3
X
- Definition
Tax basis of mortgage loans.
+ References
No definition available.
+ Details
Name:
bxmt_TaxBasisOfMortgageLoans
Namespace Prefix:
bxmt_
Data Type:
xbrli:monetaryItemType
Balance Type:
debit
Period Type:
instant
X
- References
No definition available.
+ Details
Name:
us-gaap_MortgageLoansOnRealEstateAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration