Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities
Net income	$ 58,676,000	$ 52,826,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	684,000	748,000
Net amortization of investments	6,520,000	8,414,000
Deferred income taxes	(203,000)	1,388,000
Net realized losses on investments	27,000	1,471,000
Net unrealized gains on equity securities	(3,165,000)	(259,000)
Net realized losses on disposal of assets	2,000
Share-based compensation	882,000	1,074,000
Changes in operating assets and liabilities:
Premiums receivable, net	(8,171,000)	(4,391,000)
Accrued interest receivable	(207,000)	(141,000)
Deferred policy acquisition costs	(607,000)	(1,075,000)
Amounts held by others		(7,855,000)
Other assets	(949,000)	2,692,000
Reserves for loss and loss adjustment expenses	(7,597,000)	19,284,000
Unearned premiums	5,339,000	7,897,000
Reinsurance balances	9,140,000	(19,136,000)
Amounts held for others and policyholder deposits	2,416,000	2,621,000
Accounts payable and other liabilities	(309,000)	5,185,000
Net cash provided by operating activities	62,478,000	70,743,000
Investing activities
Purchases of investments held-to-maturity	(115,712,000)	(71,872,000)
Purchases of investments available-for-sale	(46,104,000)	(82,519,000)
Purchases of equity securities	(4,120,000)	(5,251,000)
Purchases of short-term investments	(79,224,000)	(133,355,000)
Proceeds from maturities of investments held-to-maturity	120,498,000	85,322,000
Proceeds from sales and maturities of investments available-for-sale	90,244,000	79,539,000
Proceeds from sales and maturities of short-term investments	73,039,000	48,965,000
Proceeds from redemptions of other investments		130,000
Purchases of property and equipment	(858,000)	(1,083,000)
Net cash provided by (used in) investing activities	37,763,000	(80,124,000)
Financing activities
Proceeds from stock option exercises	19,800	66,900
Finance lease purchases	(35,000)
Dividends to shareholders	(14,700,000)	(12,921,000)
Net cash used in financing activities	(14,715,000)	(12,854,000)
Change in cash and cash equivalents	85,526,000	(22,235,000)
Cash and cash equivalents at beginning of period	40,344,000	55,559,000
Cash and cash equivalents at end of period	$ 125,870,000	$ 33,324,000