Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 28,054	$ 5,737
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Depreciation and amortization expense	2,626	2,479
Deferred federal income taxes	3,634	(988)
Investment (gains) losses, net	(18,754)	4,302
Share-based payments expense	197	1
Change in ceded unearned premiums	(17,852)	(15,181)
Change in premiums receivable	(24,896)	(7,815)
Change in accounts receivable	287	(538)
Change in deferred policy acquisition costs	(6,017)	1,944
Change in unpaid losses and loss adjustment expenses	24,296	(6,548)
Change in unearned premiums	53,569	13,535
Change in reinsurance recoverable	(48,126)	(32,117)
Change in reinsurance balances payable	6,649	13,072
Change in current federal income tax payable	866	7,719
Change in all other liabilities	(2,708)	2,899
Change in all other assets	4,860	1,604
Net cash provided by (used in) operating activities	6,685	(9,895)
Cash flows from investing activities:
Purchases of property and equipment	(2,447)	(1,118)
Purchases of investment securities	(97,292)	(97,610)
Maturities, sales and redemptions of investment securities	123,599	124,873
Net cash provided by investing activities	23,860	26,145
Cash flows from financing activities:
Proceeds from exercise of employee stock options	1,520	242
Purchase of treasury shares	(1,380)	(1,464)
Net cash provided by (used in) financing activities	140	(1,222)
Increase in cash and cash equivalents and restricted cash	30,685	15,028
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	$ 71,156	$ 82,661