Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Cash Flows [Abstract]
Net cash provided by (used in) operating activities	$ 7,828	$ (39,084)
Cash flows from investing activities:
Sale of investment securities	75,538	35,009
Purchase of investment securities	(67,628)	(36,763)
Proceeds from sale or liquidation of long-term investments	110	0
Purchase of long-term investments	(5,000)	(1,000)
Investments in real estate ventures	(7,816)	(4,068)
Distributions from investments in real estate ventures	0	2,575
Increase in cash surrender value of life insurance policies	(606)	(47)
Increase in restricted assets	(6,933)	(390)
Proceeds from sale of fixed assets	3	0
Capital expenditures	(3,156)	(6,424)
Repayments of notes receivable	1,106	933
Pay downs of investment securities	1,594	0
Net cash used in investing activities	(12,788)	(10,175)
Cash flows from financing activities:
Proceeds from issuance of debt	0	260,508
Deferred financing costs	(585)	(8,210)
Repayments of debt	(1,857)	(2,215)
Borrowings under revolver	107,668	196,842
Repayments on revolver	(110,792)	(211,520)
Dividends and distributions on common stock	(46,350)	(40,865)
Proceeds from exercise of Vector options	809	1,385
Tax benefit of options exercised	274	344
Net cash (used in) provided by financing activities	(50,833)	196,269
Net (decrease) increase in cash and cash equivalents	(55,793)	147,010
Cash and cash equivalents, beginning of period	326,365	234,466
Cash and cash equivalents, end of period	$ 270,572	$ 381,476