Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:
Net income	$ 48,102	$ 50,000
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	6,600	3,418
Net amortization of premiums on investments in fixed-maturity securities	654	191
Depreciation and amortization	3,682	1,482
Deferred income benefits	(5,319)	(1,499)
Net realized investment gains	(4,465)	(43)
Income from real estate investments	(44)	0
Loss from joint venture	22	0
(Gain) loss on sale of real estate investment	(1)	2
Foreign currency remeasurement loss	10	72
Changes in operating assets and liabilities:
Premiums and reinsurance receivable	(11,909)	(13,958)
Advance premiums	6,013	5,599
Prepaid reinsurance premiums	(2,899)	(23,423)
Accrued interest and dividends receivable	125	(197)
Other assets	(13,645)	(5,091)
Assumed reinsurance balances payable	(4,660)	(791)
Deferred policy acquisition costs	(6,101)	(8,840)
Losses and loss adjustment expenses	3,968	2,356
Unearned premiums	31,891	33,871
Income taxes	(2,539)	(7,553)
Accrued expenses and other liabilities	14,396	11,024
Net cash provided by operating activities	63,881	46,620
Cash flows from investing activities:
Investment in real estate under acquisition, development, and construction arrangement	(2,608)	0
Investment in joint venture	(4,500)	0
Purchase of property and equipment, net	(325)	(3,107)
Purchase of real estate investments	(352)	(666)
Purchase of fixed-maturity securities	(56,229)	(31,309)
Purchase of equity securities	(32,608)	(5,144)
Proceeds from sales of fixed-maturity securities	67,519	1,749
Proceeds from calls, repayments and maturities of fixed-maturity securities	2,960	2,534
Proceeds from sales of equity securities	9,232	2,021
Proceeds from sales of real estate investments	1	0
Net cash used in investing activities	(16,910)	(33,922)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	0	40,250
Proceeds from the exercise of common stock options	125	0
Cash dividends paid	(9,357)	(7,704)
Cash dividends received under share repurchase forward contract	514	0
Repurchases of common stock	(616)	(893)
Repurchases of common stock under share repurchase plan	(27,815)	0
Redemption of Series A preferred stock	(34)	0
Debt issuance costs	(234)	(1,525)
Tax benefits on stock-based compensation	1,384	892
Net cash (used in) provided by financing activities	(36,033)	31,020
Effect of exchange rate changes on cash	(13)	(54)
Net increase in cash and cash equivalents	10,925	43,664
Cash and cash equivalents at beginning of period	293,398	230,214
Cash and cash equivalents at end of period	304,323	273,878
Supplemental disclosure of cash flow information:
Cash paid for income taxes	35,836	39,335
Cash paid for interest	5,453	1,726
Non-cash investing and financing activities:
Unrealized loss on investments in available-for-sale securities, net of tax	(85)	(449)
Series A Preferred Stock [Member]
Non-cash investing and financing activities:
Conversion of Series A Preferred Stock to common stock	$ 991	$ 814