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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net cash provided by (used in) operating activities	$ 158,081	$ 140,965
Cash flows from investing activities:
Proceeds from sale of property and equipment	17	15
Purchases of property and equipment	(4,024)	(2,757)
Purchases of equity securities	(19,106)	(13,275)
Purchases of available-for-sale debt securities	(205,738)	(67,517)
Purchases of investment real estate, net	(1,269)	(3,759)
Proceeds from sales of equity securities	4,127	56,971
Proceeds from sales of available-for-sale debt securities	119,222	6,507
Maturities of available-for-sale debt securities	64,480	39,144
Maturities of available-for-sale short-term investments	10,000	5,000
Net cash provided by (used in) investing activities	(32,291)	20,329
Cash flows from financing activities:
Preferred stock dividend	(5)	(5)
Common stock dividend	(9,821)	(9,803)
Issuance of common stock for stock option exercises	73
Purchase of treasury stock	(11,116)	(8,919)
Payments related to tax withholding for share-based compensation	(6,583)	(1,367)
Repayment of debt	(736)	(1,435)
Net cash provided by (used in) financing activities	(28,188)	(21,529)
Cash and cash equivalents, and restricted cash and cash equivalents:
Net increase (decrease) during the period	97,602	139,765
Balance, beginning of period	216,121	108,365
Balance, end of period	$ 313,723	$ 248,130

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