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Municipal Bond Guarantee (Tables)
3 Months Ended
Mar. 31, 2018
Guarantees [Abstract]  
Schedule of Municipal Bond Guarantee Insured Obligations
The following table presents a schedule of BAM’s insured obligations:
 
 
March 31, 2018
 
December 31, 2017
Contracts outstanding
 
6,541

 
6,371

Remaining weighted average contract period outstanding (in years)
 
10.8

 
10.9

Contractual debt service outstanding (in millions):
 
 
 
 
  Principal
 
$
43,139.2

 
$
42,090.6

  Interest
 
21,420.6

 
21,057.1

  Total debt service outstanding
 
$
64,559.8

 
$
63,147.7

 
 
 
 
 
Gross unearned insurance premiums
 
$
140.2

 
$
136.8

Financial Guarantee Insurance Contracts, Premium Received over Contract Period
The following table presents a schedule of BAM’s future premium revenues as of March 31, 2018:
Millions
 
March 31, 2018
April 1, 2018 - December 31, 2018
 
$
8.9

 
 
 
January 1, 2019 - March 31, 2019
 
2.9

April 1, 2019 - June 30, 2019
 
2.9

July 1, 2019 - September 30, 2019
 
2.9

October 1, 2019 - December 31, 2019
 
2.9

 
 
11.6

 
 
 
2020
 
11.1

2021
 
10.6

2022
 
10.1

2023 and thereafter
 
87.9

Total gross unearned insurance premiums
 
$
140.2


Schedule of Net Written Premiums
The following table presents a schedule of net written premiums included in White Mountains’s HG Global/BAM segment for the three months years ended March 31, 2018 and 2017:
 
 
Three Months Ended March 31,
Millions
 
2018
 
2017
Gross written premiums
 
$
6.4

 
$
18.7

Assumed (ceded) written premiums
 

 

Net written premiums
 
$
6.4

 
$
18.7