Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash Flows From Operating Activities
Net income	$ 58,231	$ 24,341
Adjustments to reconcile net income to net cash provided by operating activities
Net accretion of bond premium	10,534	10,985
Depreciation and amortization	7,706	5,449
Stock-based compensation expense	1,817	1,445
Net realized investment gains	(2,622)	(5,796)
Net cash flows from trading investments	2,663	(6,933)
Deferred income tax benefit	(3,854)	(2,639)
Changes in:
Accrued investment income	(304)	398
Premiums receivable	(46,628)	(39,945)
Deferred policy acquisition costs	(16,884)	(10,219)
Reinsurance receivables	12,395	3,384
Prepaid reinsurance premiums	(266)	(552)
Income taxes receivable	(1,928)	(3,173)
Other assets	(1,561)	482
Future policy benefits and losses, claims and loss settlement expenses	60,932	70,994
Unearned premiums	50,097	49,974
Accrued expenses and other liabilities	811	(9,153)
Income taxes payable	(5,012)	0
Deferred income taxes	(499)	(1,330)
Other, net	(1,221)	(368)
Total adjustments	66,176	63,003
Net cash provided by operating activities	124,407	87,344
Cash Flows From Investing Activities
Proceeds from sale of available-for-sale investments	8,228	3,091
Proceeds from call and maturity of held-to-maturity investments	108	243
Proceeds from call and maturity of available-for-sale investments	527,365	390,967
Proceeds from short-term and other investments	4,221	2,370
Purchase of available-for-sale investments	(502,086)	(432,112)
Purchase of short-term and other investments	(4,643)	(2,803)
Net purchases and sales of property and equipment	(10,763)	(5,692)
Net cash provided by (used in) investing activities	22,430	(43,936)
Policyholders’ account balances
Deposits to investment and universal life contracts	78,733	131,134
Withdrawals from investment and universal life contracts	(175,840)	(170,570)
Payment of cash dividends	(16,024)	(14,672)
Repurchase of common stock	(2,423)	(11,249)
Issuance of common stock	2,679	1,782
Tax impact from issuance of common stock	(475)	(94)
Net cash used in financing activities	(113,350)	(63,669)
Net Change in Cash and Cash Equivalents	33,487	(20,261)
Cash and Cash Equivalents at Beginning of Period	90,574	92,193
Cash and Cash Equivalents at End of Period	$ 124,061	$ 71,932