CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)		Jun. 30, 2021 USD ($)		Jun. 30, 2020 USD ($)
Cash flows from operating activities:
Net cash provided by operating activities			$ 257,120		$ 190,847
Cash flows from investing activities:
Proceeds from sale of property and equipment			28		22
Purchases of property and equipment			(3,024)		(10,213)
Purchases of equity securities			(14,192)		(10,145)
Purchases of available-for-sale debt securities			(237,353)		(91,445)
Proceeds from sales of equity securities	$ 3,589		5,165		0
Proceeds from sales of available-for-sale debt securities			60,978		28,468
Proceeds from sales of investment real estate			2,591		0
Maturities of available-for-sale debt securities			53,313		71,214
Net cash provided by (used in) investing activities			(132,494)		(12,099)
Cash flows from financing activities:
Preferred stock dividend			(5)		(5)
Common stock dividend			(10,101)		(10,405)
Purchase of treasury stock			(245)		(16,616)
Payments related to tax withholding for share-based compensation			(784)		(1,070)
Repayment of debt			(735)		(735)
Net cash provided by (used in) financing activities			(11,870)		(28,831)
Cash and cash equivalents, and restricted cash and cash equivalents:
Net increase (decrease) during the period			112,756		149,917
Balance, beginning of period			179,871		184,744
Balance, end of period	292,627		292,627		334,661
Cash and cash equivalents, and restricted cash and cash equivalents within the Consolidated Balance Sheets
Cash and cash equivalents	286,493		286,493
Restricted cash and cash equivalents	6,134	[1]	6,134	[1]
Total cash and cash equivalents and restricted cash and cash equivalents	$ 292,627		$ 292,627		$ 334,661

[1] See “—Note 5 (Insurance Operations)” for a discussion of the nature of the restrictions for restricted cash and cash equivalents and “—Note 14 (Variable Interest Entities)” for a discussion of restricted cash held in a trust account.