Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows From Operating Activities
Net income	$ 37,909	$ 58,231
Adjustments to reconcile net income to net cash provided by operating activities
Net accretion of bond premium	10,883	10,534
Depreciation and amortization	4,879	7,706
Stock-based compensation expense	2,731	1,817
Net realized investment gains	(6,241)	(2,622)
Net cash flows from trading investments	(36)	2,663
Deferred income tax benefit	(2,187)	(3,854)
Changes in:
Accrued investment income	(1,871)	(304)
Premiums receivable	(54,725)	(46,628)
Deferred policy acquisition costs	(8,831)	(16,884)
Reinsurance receivables	(13,632)	12,395
Prepaid reinsurance premiums	(212)	(266)
Income taxes receivable	(11,732)	(1,928)
Other assets	545	(1,561)
Future policy benefits and losses, claims and loss settlement expenses	128,657	60,932
Unearned premiums	53,688	50,097
Accrued expenses and other liabilities	(6,966)	811
Income taxes payable	(4,917)	(5,012)
Deferred income taxes	2,196	(499)
Other, net	(2,069)	(1,221)
Total adjustments	90,160	66,176
Net cash provided by operating activities	128,069	124,407
Cash Flows From Investing Activities
Proceeds from sale of available-for-sale investments	5,049	8,228
Proceeds from call and maturity of held-to-maturity investments	20	108
Proceeds from call and maturity of available-for-sale investments	428,009	527,365
Proceeds from short-term and other investments	2,235	4,221
Purchase of available-for-sale investments	(446,156)	(502,086)
Purchase of short-term and other investments	(3,091)	(4,643)
Net purchases and sales of property and equipment	(6,090)	(10,763)
Net cash (used in) provided by investing activities	(20,024)	22,430
Policyholders’ account balances
Deposits to investment and universal life contracts	63,967	78,733
Withdrawals from investment and universal life contracts	(123,071)	(175,840)
Payment of cash dividends	(18,246)	(16,024)
Repurchase of common stock	(2,867)	(2,423)
Issuance of common stock	7,149	2,679
Tax impact from issuance of common stock	(482)	(475)
Net cash used in financing activities	(73,550)	(113,350)
Net Change in Cash and Cash Equivalents	34,495	33,487
Cash and Cash Equivalents at Beginning of Period	106,449	90,574
Cash and Cash Equivalents at End of Period	$ 140,944	$ 124,061