Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating activities:
Net income	$ 63,314	$ 76,054
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation & amortization	3,892	3,544
Deferred income taxes	(185)	8,500
Net realized (gains) losses	(10,453)	(12,024)
Net other-than-temporary impairments recognized in earnings	1,698	0
Changes in assets and liabilities:
Reinsurance recoverable on paid and unpaid losses and loss adjustment expenses	55,436	(39,087)
Reserves for losses and loss adjustment expenses	15,683	123,903
Prepaid reinsurance premiums	(14,637)	11,089
Unearned premiums	81,237	58,920
Premiums receivable	(735)	(38,028)
Deferred policy acquisition costs	(9,507)	(9,261)
Accrued investment income	(1,338)	(1,209)
Reinsurance balances payable	(18,993)	(9,941)
Current income tax payable, net	411	7,080
Other	(6,679)	1,841
Net cash provided by (used in) operating activities	159,144	181,381
Fixed maturities
Redemptions and maturities	126,930	162,931
Sales	266,707	313,218
Purchases	(446,516)	(718,693)
Equity securities
Sales	76,388	54,828
Purchases	(178,517)	(65,691)
Change in payable for securities	28,465	24,231
Net change in short-term investments	(53,747)	40,610
Purchase of property and equipment	(1,503)	(5,522)
Net cash provided by (used in) investing activities	(181,793)	(194,088)
Financing activities:
Proceeds of stock issued from employee stock purchase plan	1,352	453
Proceeds of stock issued from exercise of stock options	29	153
Net cash provided by (used in) financing activities	1,381	606
Change in cash	(21,268)	(12,101)
Cash at beginning of year	90,751	86,509
Cash at end of period	69,483	74,408
Supplemental cash information:
Income taxes paid, net	28,634	19,864
Interest paid	7,619	8,084
Issuance of stock to directors	$ 563	$ 438