Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating activities:
Net income	$ 45,113	$ 44,829
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation & amortization	2,424	2,482
Deferred income taxes	2,268	49
Net realized (gains) losses	(9,935)	(5,306)
Net other-than-temporary impairments recognized in earnings	423
Changes in assets and liabilities:
Reinsurance recoverable on paid and unpaid losses and loss adjustment expenses	(1,891)	(23,233)
Reserves for losses and loss adjustment expenses	(28,478)	92,731
Prepaid reinsurance premiums	(22,159)	1,518
Unearned premiums	90,901	87,547
Premiums receivable	(64,643)	(92,097)
Deferred policy acquisition costs	(5,453)	(9,968)
Accrued investment income	219	(713)
Reinsurance balances payable	2,888	(7,991)
Current income tax payable, net	(1,781)	2,437
Accounts payable	(21,145)	(6,594)
Other	13,935	(7,543)
Net cash provided by (used in) operating activities	2,686	78,148
Fixed maturities
Redemptions and maturities	78,127	103,838
Sales	252,250	200,325
Purchases	(303,725)	(445,533)
Equity securities
Sales	64,046	10,832
Purchases	(79,870)	(38,007)
Change in payable for securities	7,824	10,991
Net change in short-term investments	(22,214)	69,881
Purchase of property and equipment	(1,233)	(4,986)
Net cash provided by (used in) investing activities	(4,795)	(92,659)
Financing activities:
Proceeds of stock issued from employee stock purchase plan	608	453
Proceeds of stock issued from exercise of stock options		153
Net cash provided by (used in) financing activities	608	606
Change in cash	(1,501)	(13,905)
Cash at beginning of year	90,751	86,509
Cash at end of period	89,250	72,604
Supplemental cash information:
Income taxes paid, net	26,585	18,918
Interest paid	7,619	8,084
Issuance of stock to directors	$ 563	$ 438