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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2019
Fair Value Disclosures [Abstract]  
Assets Measured for at Fair Value on Recurring Basis
The following tables set forth by level within the fair value hierarchy the Company’s assets measured at fair value on a recurring basis as of the dates presented (in thousands):
 
Fair Value Measurements
 
September 30, 2019
 
Level 1
 
Level 2
 
Level 3
 
Total
Available-For-Sale Debt Securities:
 

 
 

 
 

 
 

  U.S. government obligations and agencies
$

 
$
72,586

 
$

 
$
72,586

  Corporate bonds

 
469,298

 

 
469,298

  Mortgage-backed and asset-backed securities

 
321,134

 

 
321,134

  Municipal bonds

 
3,542

 

 
3,542

  Redeemable preferred stock

 
12,007

 

 
12,007

Equity Securities:
 
 
 
 
 
 
 
  Common stock
2,678

 

 

 
2,678

  Mutual funds
40,463

 

 

 
40,463

Total assets accounted for at fair value
$
43,141

 
$
878,567

 
$

 
$
921,708

 
Fair Value Measurements
 
December 31, 2018
 
Level 1
 
Level 2
 
Level 3
 
Total
Available-For-Sale Debt Securities:
 
 
 
 
 
 
 
  U.S. government obligations and agencies
$

 
$
66,637

 
$

 
$
66,637

  Corporate bonds

 
428,865

 

 
428,865

  Mortgage-backed and asset-backed securities

 
309,597

 

 
309,597

  Municipal bonds

 
3,362

 

 
3,362

  Redeemable preferred stock

 
11,977

 

 
11,977

Equity Securities:
 
 
 
 
 
 
 
  Common stock
15,564

 

 

 
15,564

  Mutual funds
47,713

 

 

 
47,713

Total assets accounted for at fair value
$
63,277

 
$
820,438

 
$

 
$
883,715


Summarizes Carrying Value and Estimated Fair Values of Financial Instruments not Carried at Fair Value
The following table summarizes the carrying value and estimated fair values of the Company’s financial instruments not carried at fair value as of the dates presented (in thousands):
 
September 30, 2019
 
December 31, 2018
 
Carrying Value
 
(Level 3) Estimated Fair Value
 
Carrying Value
 
(Level 3) Estimated Fair Value
Liabilities (debt):
 
 
 
 
 
 
 
   Surplus note
$
10,294

 
$
9,584

 
$
11,397

 
$
10,125