Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 11,719	$ 6,199
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization expense	1,448	2,049
Deferred federal income taxes	(1,834)	(1,179)
Net realized (gains) losses	(4,023)	99
Share-based payments expense	537	221
Change in ceded unearned premiums	(6,957)	(15,664)
Change in premiums receivable	(16,599)	(8,632)
Change in accounts receivable	1,013	(823)
Change in deferred policy acquisition costs	(564)	2,829
Change in unpaid losses and loss adjustment expenses	29,192	32,657
Change in unearned premiums	16,464	11,665
Change in reinsurance recoverable	(2,865)	(22,938)
Change in reinsurance balances payable	6,065	13,584
Change in current federal income tax payable	2,039	125
Change in all other liabilities	(2,371)	(2,661)
Change in all other assets	(386)	2,050
Net cash provided by operating activities	32,878	19,581
Cash flows from investing activities:
Purchases of property and equipment	(2,090)	(576)
Net transfers from restricted cash	(2,773)	(3,231)
Purchases of investment securities	(109,799)	(69,144)
Maturities, sales and redemptions of investment securities	67,489	70,262
Net cash used in investing activities	(47,173)	(2,689)
Cash flows from financing activities:
Activity under revolving credit facility, net		(1,473)
Proceeds from exercise of employee stock options	594	16
Purchase of treasury shares	(730)	(736)
Net cash used in financing activities	(136)	(2,193)
(Decrease) increase in cash and cash equivalents	(14,431)	14,699
Cash and cash equivalents at beginning of period	130,985	141,666
Cash and cash equivalents at end of period	116,554	156,365
Supplemental cash flow information:
Interest paid	2,274	2,295
Income taxes paid	5,040	3,309
Supplemental schedule of non-cash investing activities:
Change in receivable for securities related to investment disposals that settled after the balance sheet date	(1,635)	(155)
Change in payable for securities related to investment purchases that settled after the balance sheet date	$ 2,091	$ 17,702