Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Condensed Consolidated Statements of Cash Flows
Net cash provided by operating activities	$ 83,773	$ 105,347
Purchase of:
Fixed income securities, available-for-sale	(185,502)	(214,332)
Equity securities	(48,473)	(59,861)
Property and equipment	(3,413)	(3,004)
Other	(6,651)	(7,122)
Proceeds from sale of:
Fixed income securities, available-for-sale	40,333	132,153
Equity securities	52,533	33,360
Other	2,596	1,842
Proceeds from call or maturity of:
Fixed income securities, available-for-sale	121,911	52,113
Net proceeds from sale (purchase) of short-term investments		(35,803)
Net cash used in investing activities	(26,666)	(100,654)
Cash Flows from Financing Activities
Cash dividends paid	(21,119)	(20,092)
Proceeds from stock option exercises	2,606	10,093
Net cash used in financing activities	(18,513)	(9,999)
Net increase (decrease) in cash	38,594	(5,306)
Cash at the beginning of the period	46,203	30,140
Cash at the end of the period	$ 84,797	$ 24,834