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ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)
 12 Months Ended
Dec. 31, 2018
Equity [Abstract]  
Components of Accumulated Other Comprehensive Income (Loss) The following table shows the changes in the components of our accumulated other comprehensive income (loss), net of tax, for the years ended December 31, 2018, 2017 and 2016:

 
 
 
Liability for
 
 
 
Net unrealized
 
underfunded
 
 
 
appreciation
 
employee
 
 
 
on investments
 
benefit costs
 
Total
Balance as of January 1, 2016
$
128,369

 
$
(47,932
)
 
$
80,437

Change in accumulated other comprehensive income before reclassifications
8,461

 
19,529

 
27,990

Reclassification adjustments from accumulated other comprehensive income
(2,938
)
 
3,566

 
628

Balance as of December 31, 2016
$
133,892

 
$
(24,837
)
 
$
109,055

Change in accumulated other comprehensive income before reclassifications
48,467

 
(19,878
)
 
28,589

Reclassification adjustments from accumulated other comprehensive income
(4,152
)
 
3,514

 
(638
)
Accumulated effect of change in enacted tax rate
36,658

 
(5,350
)
 
31,308

Balance as of December 31, 2017
$
214,865

 
$
(46,551
)
 
$
168,314

Cumulative effect of change in accounting principle
(191,244
)
 
 
 
(191,244
)
Change in accumulated other comprehensive income before reclassifications
(33,564
)
 
20,155

 
(13,409
)
Reclassification adjustments from accumulated other comprehensive income
620

 
5,247

 
5,867

Balance as of December 31, 2018
$
(9,323
)
 
$
(21,149
)
 
$
(30,472
)