CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net cash provided by operating activities	$ 45,643	$ 31,451
Cash flows from investing activities:
Proceeds from sale of property and equipment	11	8
Purchases of property and equipment	(4,705)	(6,368)
Purchases of equity securities	(10,145)	(697)
Purchases of available-for-sale debt securities	(61,782)	(55,102)
Purchases of investment real estate, net	0	(734)
Proceeds from sales of equity securities	0	17,161
Proceeds from sales of available-for-sale debt securities	9,979	14,550
Maturities of available-for-sale debt securities	32,534	36,635
Net cash provided by (used in) investing activities	(34,108)	5,453
Cash flows from financing activities:
Preferred stock dividend	(3)	(3)
Common stock dividend	(5,261)	(5,620)
Issuance of common stock for stock option exercises	0	239
Purchase of treasury stock	(6,587)	(10,117)
Payments related to tax withholding for share-based compensation	(646)	(2,402)
Repayment of debt	(367)	(368)
Net cash provided by (used in) financing activities	(12,864)	(18,271)
Cash and cash equivalents, and restricted cash and cash equivalents:
Net increase (decrease) during the period	(1,329)	18,633
Balance, beginning of period	184,744	169,063
Balance, end of period	183,415	187,696
Cash and cash equivalents, and restricted cash and cash equivalents within the Consolidated Balance Sheets
Total cash and cash equivalents and restricted cash and cash equivalents	$ 184,744	$ 187,696