Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows From Operating Activities
Net income	$ 38,697	$ 24,016
Adjustments to reconcile net income to net cash provided by operating activities
Net accretion of bond premium	7,126	7,601
Depreciation and amortization	3,234	3,757
Stock-based compensation expense	1,200	944
Net realized investment gains	(1,656)	(4,902)
Net cash flows from trading investments	652	(7,481)
Deferred income tax benefit	(2,742)	(1,346)
Changes in:
Accrued investment income	799	764
Premiums receivable	(53,776)	(49,459)
Deferred policy acquisition costs	(14,557)	(11,143)
Reinsurance receivables	12,918	6,137
Prepaid reinsurance premiums	(342)	(610)
Income taxes receivable	(6,042)	(2,105)
Other assets	196	699
Future policy benefits and losses, claims and loss settlement expenses	43,735	37,769
Unearned premiums	53,048	54,682
Accrued expenses and other liabilities	15,679	(1,083)
Income taxes payable	(5,012)	0
Deferred income taxes	(434)	(72)
Other, net	(1,467)	(2,975)
Total adjustments	52,559	31,177
Net cash provided by operating activities	91,256	55,193
Cash Flows From Investing Activities
Proceeds from sale of available-for-sale investments	8,228	10
Proceeds from call and maturity of held-to-maturity investments	41	26
Proceeds from call and maturity of available-for-sale investments	374,173	249,251
Proceeds from short-term and other investments	3,833	1,648
Purchase of available-for-sale investments	(384,065)	(270,194)
Purchase of short-term and other investments	(3,583)	(1,938)
Net purchases and sales of property and equipment	(3,711)	(4,154)
Net cash used in investing activities	(5,084)	(25,351)
Cash Flows From Financing Activities
Deposits to investment and universal life contracts	57,340	96,119
Withdrawals from investment and universal life contracts	(129,814)	(114,096)
Payment of cash dividends	(10,503)	(9,630)
Repurchase of common stock	(1,443)	(5,567)
Issuance of common stock	1,375	1,457
Tax impact from issuance of common stock	(319)	(42)
Net cash used in financing activities	(83,364)	(31,759)
Net Change in Cash and Cash Equivalents	2,808	(1,917)
Cash and Cash Equivalents at Beginning of Period	90,574	92,193
Cash and Cash Equivalents at End of Period	$ 93,382	$ 90,276