Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash Flows From Operating Activities
Net income	$ 76,140	$ 40,212	$ 11
Adjustments to reconcile net income to net cash provided by operating activities
Net accretion of bond premium	15,291	15,183	11,638
Depreciation and amortization	5,603	7,979	5,583
Stock-based compensation expense	1,777	1,764	1,829
Net realized investment gains	(8,695)	(5,453)	(6,440)
Net cash flows from trading investments	3,852	403	(1,993)
Deferred income tax expense (benefit)	(368)	7,452	(6,288)
Changes in:
Accrued investment income	2,452	1,844	499
Premiums receivable	(30,346)	(15,941)	(12,067)
Deferred policy acquisition costs	(2,690)	(3,467)	11,709
Reinsurance receivables	26,948	14,175	(23,649)
Prepaid reinsurance premiums	(197)	3,228	1,684
Income taxes receivable	14,750	10,206	(6,310)
Other assets	(1,417)	3,603	9,970
Future policy benefits and losses, claims and loss settlement expenses	21,251	64,384	67,302
Unearned premiums	28,814	22,659	16,401
Accrued expenses and other liabilities	8,499	14,950	3,504
Deferred income taxes	6,983	(8,234)	(82)
Other, net	(7,156)	(2,871)	1,130
Total adjustments	85,351	131,864	74,420
Net cash provided by operating activities	161,491	172,076	74,431
Cash Flows From Investing Activities
Proceeds from sale of available-for-sale investments	23,007	20,324	39,496
Proceeds from call and maturity of held-to-maturity investments	1,004	2,709	2,243
Proceeds from call and maturity of available-for-sale investments	477,071	527,720	563,515
Proceeds from short-term and other investments	7,170	4,810	4,741
Purchase of held-to-maturity investments	0	(200)	0
Purchase of available-for-sale investments	(587,412)	(653,467)	(595,162)
Purchase of short-term and other investments	(14,375)	(10,350)	(3,357)
Net purchases and sales of property and equipment	(8,451)	(2,886)	(14,048)
Acquisition of property and casualty company, net of cash acquired	0	0	(172,620)
Net cash used in investing activities	(101,986)	(111,340)	(175,192)
Policyholders’ account balances
Deposits to investment and universal life contracts	150,272	141,252	170,678
Withdrawals from investment and universal life contracts	(208,827)	(156,881)	(119,716)
Borrowings of short-term debt	0	0	124,900
Repayment of short-term debt	0	(45,000)	(82,900)
Repayment of trust preferred securities	0	(15,626)	0
Payment of cash dividends	(17,484)	(15,269)	(15,507)
Repurchase of common stock	(1,644)	(7,301)	(12,433)
Issuance of common stock	3,393	1,106	208
Tax impact from issuance of common stock	(488)	(78)	1
Net cash (used in) provided by financing activities	(74,778)	(97,797)	65,231
Net Change in Cash and Cash Equivalents	(15,273)	(37,061)	(35,530)
Cash and Cash Equivalents at Beginning of Year	107,466	144,527	180,057
Cash and Cash Equivalents at End of Year	$ 92,193	$ 107,466	$ 144,527