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Other Comprehensive Income (Tables)
 12 Months Ended
Dec. 31, 2016
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]  
Schedule of accumulated balances for each classification of other comprehensive income (loss)
The following tables present the accumulated balances for each classification of other comprehensive income (loss):

 
 
 
Year Ended December 31, 2016
 
 
Unrealized holding gains / losses arising on
fixed maturities, available-for-sale
 
Unrealized holding gains / losses arising on cash flow hedges
 
Future policy benefits, DAC and VOBA adjustments
 
Employee benefit plan adjustment
 
Total
Balances, January 1, 2016
 
$
339,520

 
$
45,284

 
$
(65,785
)
 
$
(85,581
)
 
$
233,438

Other comprehensive income (loss) before reclassifications
 
13,192

 
29,104

 
7,139

 
(4,755
)
 
44,680

Amounts reclassified from AOCI
 
(40,964
)
 
(7,312
)
 
—

 
6,033

 
(42,243
)
Net current period other comprehensive income (loss)
 
(27,772
)
 
21,792

 
7,139

 
1,278

 
2,437

Balances, December 31, 2016
 
$
311,748

 
$
67,076

 
$
(58,646
)
 
$
(84,303
)
 
$
235,875


 
 
Year Ended December 31, 2015
 
 
Unrealized holding gains / losses arising on
fixed maturities, available-for-sale
 
Unrealized holding gains / losses arising on cash flow hedges
 
Future policy benefits, DAC and VOBA adjustments
 
Employee benefit plan adjustment
 
Total
Balances, January 1, 2015
 
$
784,183

 
$
33,141

 
$
(108,194
)
 
$
(106,112
)
 
$
603,018

Other comprehensive income (loss) before reclassifications
 
(418,522
)
 
20,190

 
42,409

 
12,825

 
(343,098
)
Amounts reclassified from AOCI
 
(26,141
)
 
(8,047
)
 
—

 
7,706

 
(26,482
)
Net current period other comprehensive income (loss)
 
(444,663
)
 
12,143

 
42,409

 
20,531

 
(369,580
)
Balances, December 31, 2015
 
$
339,520

 
$
45,284

 
$
(65,785
)
 
$
(85,581
)
 
$
233,438


 
 
Year Ended December 31, 2014
 
 
Unrealized holding gains / losses arising on
fixed maturities, available-for-sale
 
Unrealized holding gains / losses arising on cash flow hedges
 
Future policy benefits, DAC and VOBA adjustments
 
Employee benefit plan adjustment
 
Total
Balances, January 1, 2014
 
$
434,023

 
$
25,517

 
$
(70,000
)
 
$
(43,786
)
 
$
345,754

Other comprehensive income (loss) before reclassifications
 
381,198

 
13,089

 
(38,194
)
 
(67,380
)
 
288,713

Amounts reclassified from AOCI
 
(31,038
)
 
(5,465
)
 
—

 
5,054

 
(31,449
)
Net current period other comprehensive income (loss)
 
350,160

 
7,624

 
(38,194
)
 
(62,326
)
 
257,264

Balances, December 31, 2014
 
$
784,183

 
$
33,141

 
$
(108,194
)
 
$
(106,112
)
 
$
603,018
Schedule of composition of other comprehensive income (loss)
The following tables present the composition of other comprehensive income (loss):
 
 
 
Year Ended December 31, 2016
 
 
Before-tax
 
Tax (expense)
 
Net-of-tax
 
 
amount
 
benefit
 
amount
Unrealized holding gains (losses), net, arising on fixed maturities, available-for-sale
 
$
20,295

 
$
(7,103
)
 
$
13,192

Unrealized holding gains (losses), net, arising on cash flow hedges
 
44,776

 
(15,672
)
 
29,104

Reclassification adjustment for (gains) losses, net, realized in net income
 
(74,271
)
 
25,995

 
(48,276
)
Net unrealized gains (losses) related to investments
 
(9,200
)
 
3,220

 
(5,980
)
Future policy benefits, DAC and VOBA adjustments
 
10,983

 
(3,844
)
 
7,139

Net unrealized gains (losses)
 
1,783

 
(624
)
 
1,159

Employee benefit plan adjustment
 
1,966

 
(688
)
 
1,278

Other comprehensive income (loss)
 
$
3,749

 
$
(1,312
)
 
$
2,437


 
 
Year Ended December 31, 2015
 
 
Before-tax
 
Tax (expense)
 
Net-of-tax
 
 
amount
 
benefit
 
amount
Unrealized holding gains (losses), net, arising on fixed maturities, available-for-sale
 
$
(643,880
)
 
$
225,358

 
$
(418,522
)
Unrealized holding gains (losses), net, arising on cash flow hedges
 
31,061

 
(10,871
)
 
20,190

Reclassification adjustment for (gains) losses, net, realized in net income
 
(52,597
)
 
18,409

 
(34,188
)
Net unrealized gains (losses) related to investments
 
(665,416
)
 
232,896

 
(432,520
)
Future policy benefits, DAC and VOBA adjustments
 
65,245

 
(22,836
)
 
42,409

Net unrealized gains (losses)
 
(600,171
)
 
210,060

 
(390,111
)
Employee benefit plan adjustment
 
31,586

 
(11,055
)
 
20,531

Other comprehensive income (loss)
 
$
(568,585
)
 
$
199,005

 
$
(369,580
)

 
 
Year Ended December 31, 2014
 
 
Before-tax
 
Tax (expense)
 
Net-of-tax
 
 
amount
 
benefit
 
amount
Unrealized holding gains (losses), net, arising on fixed maturities, available-for-sale
 
$
586,458

 
$
(205,260
)
 
$
381,198

Unrealized holding gains (losses), net, arising on cash flow hedges
 
20,137

 
(7,048
)
 
13,089

Reclassification adjustment for (gains) losses, net, realized in net income
 
(56,159
)
 
19,656

 
(36,503
)
Net unrealized gains (losses) related to investments
 
550,436

 
(192,652
)
 
357,784

Future policy benefits, DAC and VOBA adjustments
 
(58,760
)
 
20,566

 
(38,194
)
Net unrealized gains (losses)
 
491,676

 
(172,086
)
 
319,590

Employee benefit plan adjustment
 
(95,886
)
 
33,560

 
(62,326
)
Other comprehensive income (loss)
 
$
395,790

 
$
(138,526
)
 
$
257,264

 
Schedule of reclassifications out of accumulated other comprehensive income (loss)
The following table presents the reclassifications from accumulated other comprehensive income (loss):
 
 
Year Ended December 31,
 
 
 
 
2016
 
2015
 
2014
 
 
Details about accumulated  other comprehensive income (loss) components
 
Amount reclassified from accumulated other comprehensive income (loss)
 
Affected line item in the  statement where net income is presented
Unrealized holdings (gains) losses, net, arising on fixed maturities, available-for-sale
 
$
(63,022
)
 
$
(40,217
)
 
$
(47,751
)
 
Other realized investment (gains) losses, net
 
 
(63,022
)
 
(40,217
)
 
(47,751
)
 
Total before tax
 
 
(22,058
)
 
(14,076
)
 
(16,713
)
 
Tax expense or benefit
 
 
$
(40,964
)
 
$
(26,141
)
 
$
(31,038
)
 
Net of tax
 
 
 
 
 
 
 
 
 
Unrealized holdings (gains) losses, net, arising on cash flow hedges
 
$
(13,906
)
 
$
(12,380
)
 
$
(8,408
)
 
Net investment income
 
 
2,657

 
—

 
—

 
Interest expense
 
 
(11,249
)
 
(12,380
)
 
(8,408
)
 
Total before tax
 
 
(3,937
)
 
(4,333
)
 
(2,943
)
 
Tax expense or benefit
 
 
$
(7,312
)
 
$
(8,047
)
 
$
(5,465
)
 
Net of tax
 
 
 
 
 
 
 
 
 
Amortization of employee benefit plan items
 
 
 
 
 
 
 
 
Prior service costs (benefits)
 
$
(601
)
(1) 
$
(694
)
(1) 
$
3,189

(1) 
 
Actuarial losses (gains)
 
9,882

(1) 
12,550

(1) 
2,730

(1) 
 
Settlement
 
—

(1) 
—

(1) 
1,857

(1) 
 
 
 
9,281

 
11,856

 
7,776

 
Total before tax
 
 
3,248

 
4,150

 
2,722

 
Tax expense or benefit
 
 
$
6,033

 
$
7,706

 
$
5,054

 
Net of tax
 
 
 
 
 
 
 
 
 
Total reclassification
 
$
(42,243
)
 
$
(26,482
)
 
$
(31,449
)
 
Net of tax
 

(1) These accumulated other comprehensive income components are included in the computation of net periodic (benefit) cost of employee benefit plans (see Note 17 for additional details).