Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities
Net income	$ 19,312	$ 10,800
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	270	247
Net amortization of investments	2,179	2,074
Change in investment related allowance for credit losses	(108)	(26)
Deferred income taxes	500	(481)
Net realized gains on investments	(319)	(992)
Net unrealized (gains) losses on equity securities	(5,511)	8,763
Net realized gains on disposal of assets	(23)
Share-based compensation	571	760
Changes in operating assets and liabilities:
Premiums receivable, net	(8,410)	(11,174)
Accrued interest receivable	(395)	(488)
Deferred policy acquisition costs	(874)	(671)
Other assets	(266)	234
Reserves for loss and loss adjustment expenses	(803)	6,396
Unearned premiums	8,251	5,298
Reinsurance balances	(4,914)	(9,658)
Amounts held for others and policyholder deposits	1,069	836
Federal income taxes payable	3,555	3,211
Accounts payable and other liabilities	2,509	83
Net cash provided by operating activities	16,593	15,212
Investing activities
Purchases of investments held-to-maturity	(5,281)	(26,201)
Purchases of investments available-for-sale	(22,118)	(21,592)
Purchases of equity securities	(1,895)	(8,770)
Purchases of short-term investments	(42,286)	(40,250)
Proceeds from maturities of investments held-to-maturity	13,814	22,018
Proceeds from sales and maturities of investments available-for-sale	17,947	47,812
Proceeds from sales and maturities of short-term investments	585	52,959
Purchases of property and equipment	(390)	(221)
Proceeds from sales of property and equipment	23
Net cash provided by (used in) investing activities	(39,601)	25,755
Financing activities
Finance lease purchases	(9)	(12)
Dividends to shareholders	(5,666)	(5,245)
Net cash used in financing activities	(5,675)	(5,257)
Change in cash and cash equivalents	(28,683)	35,710
Cash and cash equivalents at beginning of period	61,757	43,813
Cash and cash equivalents at end of period	$ 33,074	$ 79,523