Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 33,341	$ 15,422
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Depreciation and amortization expense	4,001	3,801
Deferred federal income taxes	2,596	445
Investment gains, net	(17,412)	(2,678)
Share-based payments expense	514	37
Change in ceded unearned premiums	(31,015)	(23,244)
Change in premiums receivable	(20,802)	(6,993)
Change in accounts receivable	(27)	49
Change in deferred policy acquisition costs	(7,613)	2,852
Change in unpaid losses and loss adjustment expenses	38,049	3,716
Change in unearned premiums	82,005	20,747
Change in reinsurance recoverable	(61,523)	(43,004)
Change in reinsurance balances payable	(5,529)	3,343
Change in current federal income tax payable	676	7,676
Change in all other liabilities	677	(4,429)
Change in all other assets	4,962	3,277
Net cash provided by (used in) operating activities	22,900	(18,983)
Cash flows from investing activities:
Purchases of property and equipment	(3,688)	(1,530)
Purchases of investment securities	(184,689)	(160,147)
Maturities, sales and redemptions of investment securities	171,587	177,693
Net cash (used in ) provided by investing activities	(16,790)	16,016
Cash flows from financing activities:
Proceeds from exercise of employee stock options	1,520	242
Payment of revolving credit facility	(30,000)
Payment of debt issuance costs	(979)
Proceeds from senior unsecured note offering	50,000
Purchase of treasury shares	(1,380)	(1,464)
Net cash provided by (used in) financing activities	19,161	(1,222)
Increase (decrease) in cash and cash equivalents and restricted cash	25,271	(4,189)
Cash and cash equivalents and restricted cash at beginning of period	40,471	67,633
Cash and cash equivalents and restricted cash at end of period	$ 65,742	$ 63,444