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Supplementary Data on Cash Flows
 12 Months Ended
Dec. 31, 2018
Supplemental Cash Flow Information [Abstract]  
Supplementary Data on Cash Flows
Supplementary Data on Cash Flows

A reconciliation of net income to net cash provided by operating activities as presented in the Statements of Cash Flows is as follows for the years ended December 31:
(in thousands)
 
2018
 
2017
 
2016
 
 
 
 
 
 
 
Cash flows from operating activities:
 
 
 
 
 
 
Net income
 
$
288,224

 
$
196,999

 
$
210,366

Adjustments to reconcile net income to net cash provided by operating activities:
 
 
 
 
 
 
Depreciation and amortization
 
13,368

 
14,831

 
15,095

Deferred income tax (benefit) expense
 
(1,358
)
 
26,912

 
(2
)
Other income tax expense (1)
 
—

 
10,095

 
—

Realized losses (gains) and impairments on investments
 
3,591

 
(1,152
)
 
(256
)
Equity in losses (earnings) of limited partnerships
 
822

 
(2,801
)
 
(7,025
)
(Gain) loss on disposal of fixed assets
 
(3,047
)
 
98

 
59

Net amortization of bond premium
 
5,601

 
7,038

 
7,436

Decrease in deferred compensation
 
(3,886
)
 
(2,681
)
 
(4,561
)
Limited partnership distributions
 
7,173

 
5,128

 
17,837

Increase in receivables from affiliates
 
(30,804
)
 
(39,788
)
 
(30,485
)
Decrease (increase) in accrued investment income
 
1,590

 
(516
)
 
(846
)
Decrease (increase) in federal income taxes recoverable
 
21,738

 
(24,640
)
 
6,687

(Increase) decrease in prepaid pension
 
(47,335
)
 
(27,265
)
 
10,524

Increase in prepaid expenses and other assets
 
(727
)
 
(7,636
)
 
(4,674
)
Increase in accounts payable and accrued expenses
 
11,039

 
17,183

 
11,144

Increase in commissions payable
 
13,449

 
17,565

 
15,017

(Decrease) increase in accrued agent bonuses
 
(19,066
)
 
7,756

 
8,020

Increase in contract liability
 
3,213

 
—

 
—

Net cash provided by operating activities
 
$
263,585

 
$
197,126

 
$
254,336


(1)
Other income tax expense for 2017 was impacted by the re-measurement of our deferred tax assets and liabilities due to the enactment of the TCJA on December 22, 2017, which reduced the corporate tax rate from 35% to 21% effective January 1, 2018.