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Fair Value of Financial Instruments
3 Months Ended
Mar. 31, 2016
Fair Value Disclosures [Abstract]  
Fair Value of Financial Instruments
Fair Value of Financial Instruments
 
White Mountains accounts for its financial instruments at fair value with the exception of the OBH Senior Notes, the Tranzact Bank Facility and MediaAlpha Bank Facility, which are recorded as debt at face value less unamortized original issue discount.
The following table summarizes the fair value and carrying value of these financial instruments as of March 31, 2016 and December 31, 2015:
 
 
March 31, 2016
 
December 31, 2015
Millions
 
Fair
Value
 
Carrying
Value
 
Fair
Value
 
Carrying
Value
OBH Senior Notes
 
$
278.0

 
$
272.9

 
$
276.4

 
$
272.9

Tranzact Bank Facility
 
92.8

 
92.4

 
102.8

 
102.9

MediaAlpha Bank Facility
 
15.1

 
17.2

 
15.0

 
14.7



The fair value estimate for the OBH Senior Notes has been determined using quoted market prices. The OBH Senior Notes are considered a Level 2 measurement based on the closing market price at the end of the first quarter of 2016.
The fair value estimate for the Tranzact Bank Facility and MediaAlpha Bank Facility have been determined based on a discounted cash flows approach and is considered to be a Level 3 measurement.