Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows From Operating Activities
Net income	$ 49,614	$ 42,630
Adjustments to reconcile net income to net cash provided by operating activities
Net accretion of bond premium	11,715	10,909
Depreciation and amortization	4,120	5,989
Stock-based compensation expense	1,436	1,318
Net realized investment gains	(7,250)	(4,658)
Net cash flows from trading investments	3,836	(337)
Deferred income tax expense (benefit)	(4,352)	7,143
Changes in:
Accrued investment income	1,311	990
Premiums receivable	(45,458)	(31,244)
Deferred policy acquisition costs	(4,640)	(4,345)
Reinsurance receivables	13,578	(19,051)
Prepaid reinsurance premiums	(475)	3,029
Income taxes receivable	13,612	10,959
Other assets	134	4,575
Future policy benefits and losses, claims and loss settlement expenses	28,404	50,429
Unearned premiums	42,486	35,347
Accrued expenses and other liabilities	9,027	17,856
Deferred income taxes	4,743	(2,820)
Other, net	(3,814)	(3,373)
Total adjustments	68,413	82,716
Net cash provided by operating activities	118,027	125,346
Cash Flows From Investing Activities
Proceeds from sale of available-for-sale investments	23,007	12,003
Proceeds from call and maturity of held-to-maturity investments	557	2,316
Proceeds from call and maturity of available-for-sale investments	370,531	433,619
Proceeds from short-term and other investments	2,569	3,791
Purchase of available-for-sale investments	(468,934)	(557,257)
Purchase of short-term and other investments	(3,475)	(9,000)
Net purchases and sales of property and equipment	(4,589)	(1,391)
Net cash used in investing activities	(80,334)	(115,919)
Policyholders’ account balances
Deposits to investment and universal life contracts	97,893	109,900
Withdrawals from investment and universal life contracts	(146,001)	(106,978)
Repayment of short-term debt	0	(45,000)
Repayment of trust preferred securities	0	(15,626)
Payment of cash dividends	(12,910)	(11,455)
Repurchase of common stock	(99)	(2,900)
Issuance of common stock	3,075	760
Tax impact from issuance of common stock	(426)	(89)
Net cash used in financing activities	(58,468)	(71,388)
Net Change in Cash and Cash Equivalents	(20,775)	(61,961)
Cash and Cash Equivalents at Beginning of Period	107,466	144,527
Cash and Cash Equivalents at End of Period	$ 86,691	$ 82,566