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Accumulated Other Comprehensive Income
 3 Months Ended
Mar. 31, 2016
Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income

The following tables provide changes in the balances of each component of accumulated other comprehensive income, net of tax, for the periods ended March 31, 2016 and 2015:
Three Months Ended March 31, 2016
Unrealized Gains and Losses
On Available-for-Sale
Securities
 
Postretirement
Benefits Plans
 
 
Total
Beginning balance at January 1
$
11,597,741

 
$
(114,726
)
 
$
11,483,015

Other comprehensive income before reclassifications
792,939

 
—

 
792,939

Amounts reclassified from accumulated other comprehensive income
(93,093
)
 
1,475

 
(91,618
)
Net current-period other comprehensive income
699,846

 
1,475

 
701,321

Ending balance
$
12,297,587

 
$
(113,251
)
 
$
12,184,336

Three Months Ended March 31, 2015
Unrealized Gains and Losses
On Available-for-Sale
Securities
 
Postretirement
Benefits Plans
 
 
Total
Beginning balance at January 1
$
12,934,497

 
$
(77,988
)
 
$
12,856,509

Other comprehensive income before reclassifications
184,227

 
—

 
184,227

Amounts reclassified from accumulated other comprehensive income
(5,794
)
 
1,304

 
(4,490
)
Net current-period other comprehensive income
178,433

 
1,304

 
179,737

Ending balance
$
13,112,930

 
$
(76,684
)
 
$
13,036,246


The following tables provide significant amounts reclassified out of each component of accumulated other comprehensive income for the periods ended March 31, 2016 and 2015:
Three Months Ended March 31, 2016
 
 
 
Details about Accumulated Other
Comprehensive Income Components
Amount Reclassified from
Accumulated Other
Comprehensive Income
 
 Affected Line Item in the Consolidated
Statements of Income
Unrealized gains and losses on available-for-sale securities:
 
 
 
Net realized gain on investments
$
186,079

 
 
Other-than-temporary impairments
(42,794
)
 
 
Total
$
143,285

 
Net realized gain on investments
Tax
(50,192
)
 
Provision for Income Taxes
Net of Tax
$
93,093

 
 
Amortization related to postretirement benefit plans:
 

 
 
Unrecognized loss
(2,235
)
 
 
Total
$
(2,235
)
 
(a)
Tax
760

 
Provision for Income Taxes
Net of Tax
$
(1,475
)
 
 
Reclassifications for the period
$
91,618

 
 
Three Months Ended March 31, 2015
 
 
 
Details about Accumulated Other
Comprehensive Income Components
Amount Reclassified from
Accumulated Other
Comprehensive Income
 
 Affected Line Item in the Consolidated
Statements of Income
Unrealized gains and losses on available-for-sale securities:
 
 
 
Net realized gain on investments
$
8,803

 
 
Other-than-temporary impairments
—

 
 
Total
$
8,803

 
Net realized gain on investments
Tax
(3,009
)
 
Provision for Income Taxes
Net of Tax
$
5,794

 
 
Amortization related to postretirement benefit plans:
 

 
 
Prior year service cost
$
(1,097
)
 
 
Unrecognized loss
(879
)
 
 
Total
$
(1,976
)
 
(a)
Tax
672

 
Provision for Income Taxes
Net of Tax
$
(1,304
)
 
 
Reclassifications for the period
$
4,490

 
 

(a)
These accumulated other comprehensive income components are not reclassified to net income in their entirety in the same reporting period. The amounts are presented within salaries, employee benefits and payroll taxes on the Consolidated Statements of Income as amortized. Amortization and accretion related to postretirement benefit plans is included in the computation of net periodic pension costs, as discussed in Note 5.