Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating activities:
Net income	$ 27,968	$ 13,910
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation & amortization	1,184	1,025
Deferred income taxes	(106)	(1,370)
Net realized (gains) losses	(833)	(4,814)
Net other-than-temporary losses recognized in earnings		42
Changes in assets and liabilities:
Reinsurance recoverable on paid and unpaid losses and loss adjustment expenses	(11,869)	5,176
Reserves for losses and loss adjustment expenses	42,400	7,338
Prepaid reinsurance premiums	2,051	(11,761)
Unearned premiums	86,063	76,976
Premiums receivable	(91,650)	(80,215)
Deferred policy acquisition costs	(12,327)	(8,344)
Accrued investment income	(355)	(1,053)
Reinsurance balances payable	(22,476)	(700)
Current income tax receivable, net	6,714	4,945
Other	(17,922)	3,157
Net cash provided by (used in) operating activities	8,842	4,312
Fixed maturities
Redemptions and maturities	50,542	28,469
Sales	107,681	362,090
Purchases	(259,494)	(358,829)
Equity securities
Sales	7,935	4,787
Purchases	(25,473)	(9,926)
Change in payable for securities	(7,469)	(42,464)
Net change in short-term investments	88,353	24,234
Purchase of property and equipment	(2,991)	(919)
Net cash provided by (used in) investing activities	(40,916)	7,442
Financing activities:
Proceeds of stock issued from employee stock purchase plan	453	374
Proceeds of stock issued from exercise of stock options	153	1,112
Net cash provided by (used in) financing activities	606	1,486
Increase (decrease) in cash	(31,468)	13,240
Cash at beginning of year	86,509	45,336
Cash at end of period	55,041	58,576
Supplemental cash information:
Income taxes paid, net	3,628	1,198
Interest paid
Issuance of stock to directors	$ 438	$ 400