Condensed Consolidated Statements Of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating Activities
Net income	$ 36,801	$ 26,194
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	958	968
Net amortization of investments	11,336	9,552
Deferred income taxes	(3,616)	(2,109)
Net realized (gains)/losses on investments	(181)	1,921
Loss on sale of asset		2
Share-based compensation	988	1,020
Changes in operating assets and liabilities:
Premiums receivable, net	(22,036)	(30,052)
Accrued interest receivable	(26)	(496)
Deferred policy acquisition costs	(1,845)	(2,666)
Other assets	(10,300)	260
Reserves for loss and loss adjustment expenses	62,052	38,592
Unearned premiums	14,153	24,211
Reinsurance balances	(13,817)	23,842
Amounts held for others and policyholder deposits	9,423	(6,142)
Accounts payable and other liabilities	20,091	14,667
Net cash provided by operating activities	103,981	99,764
Investing Activities
Purchases of investments held-to-maturity	(152,887)	(55,547)
Purchases of investments available-for-sale	(110,631)	(92,366)
Purchases of short-term investments	(72,899)	(112,624)
Purchases of other invested assets		(10,000)
Proceeds from maturities of investments held-to-maturity	84,942	83,715
Proceeds from sales and maturities of investments available-for-sale	43,283	20,606
Proceeds from sales and maturities of short-term investments	112,652	92,921
Purchases of property and equipment	(771)	(764)
Net cash used in investing activities	(96,311)	(74,059)
Financing Activities
Proceeds from stock option exercises	1,820	1,597
Tax benefit from share-based payments	1,975	1,222
Dividends to stockholders	(15,998)	(4,422)
Net cash used in financing activities	(12,203)	(1,603)
Change in cash and cash equivalents	(4,533)	24,102
Cash and cash equivalents at beginning of period	123,077	92,676
Cash and cash equivalents at end of period	$ 118,544	$ 116,778