Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities
Net income	$ 62,215	$ 58,101
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	754	738
Net amortization of investments	7,111	6,206
Change in investment related allowance for credit losses	(102)	(13)
Deferred income taxes	530	(1,398)
Net realized gains on investments	(1,490)	(1,464)
Net unrealized (gains) losses on equity securities	(8,026)	2,349
Net realized (gains) losses on disposal of assets	(21)	29
Share-based compensation	1,735	2,594
Changes in operating assets and liabilities:
Premiums receivable, net	2,243	(13,175)
Accrued interest receivable	126	235
Deferred policy acquisition costs	(770)	(189)
Amounts held by others	70	7,855
Other assets	(554)	(387)
Reserves for loss and loss adjustment expenses	(39,772)	(12,975)
Unearned premiums	6,753	2,355
Reinsurance balances	(2,591)	(2,485)
Amounts held for others and policyholder deposits	(3,423)	2,054
Federal income taxes payable	2,268	1,565
Accounts payable and other liabilities	2,368	(1,127)
Net cash provided by operating activities	29,424	50,868
Investing activities
Purchases of investments held-to-maturity	(23,231)	(62,190)
Purchases of investments available-for-sale	(31,915)	(61,023)
Purchases of equity securities	(4,886)	(10,267)
Purchases of short-term investments	(115,812)	(96,484)
Proceeds from maturities of investments held-to-maturity	63,324	86,153
Proceeds from sales and maturities of investments available-for-sale	97,069	91,493
Proceeds from sales and maturities of short-term investments	65,064	62,387
Purchases of property and equipment	(732)	(663)
Proceeds from sales of property and equipment	23
Net cash provided by investing activities	48,904	9,406
Financing activities
Finance lease purchases	(32)	(37)
Dividends to shareholders	(16,925)	(15,882)
Net cash used in financing activities	(16,957)	(15,919)
Change in cash and cash equivalents	61,371	44,355
Cash and cash equivalents at beginning of period	61,757	43,813
Cash and cash equivalents at end of period	$ 123,128	$ 88,168