Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement of Cash Flows [Abstract]
Net cash provided by operating activities	$ 318,660	$ 195,349
Cash flows from investing activities:
Sale of investment securities	20,773	16,186
Maturities of investment securities	43,405	45,798
Purchase of investment securities	(64,827)	(76,094)
Proceeds from sale or liquidation of long-term investments	30,255	0
Purchase of long-term investments	(9,238)	(1,000)
Investments in real estate ventures	(6,239)	(36,269)
Distributions from investments in real estate ventures	11,606	30,934
Increase in cash surrender value of life insurance policies	(723)	(773)
Decrease in restricted assets	384	661
Proceeds from sale of fixed assets	0	17
Capital expenditures	(8,824)	(10,158)
Purchase of subsidiaries	0	(323)
Paydowns of investment securities	627	828
Investments in real estate, net	(701)	(1,910)
Net cash provided by (used in) investing activities	16,498	(32,103)
Cash flows from financing activities:
Proceeds from issuance of debt	520	0
Deferred financing costs	0	(36)
Repayments of debt	(173,779)	(230,874)
Borrowings under revolver	130,686	204,506
Repayments on revolver	(165,639)	(221,373)
Dividends and distributions on common stock	(97,781)	(179,449)
Distributions to non-controlling interest	(448)	(285)
Proceeds from issuance of Vector stock	52,563	0
Other	0	(46)
Net cash used in financing activities	(253,878)	(427,557)
Net increase (decrease) in cash, cash equivalents and restricted cash	81,280	(264,311)
Cash, cash equivalents and restricted cash, beginning of period	379,476	591,729
Cash, cash equivalents and restricted cash, end of period	$ 460,756	$ 327,418