Consolidated Statements of Cash Flows - USD ($)	3 Months Ended		9 Months Ended		15 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 72,391,000	$ 9,085,000	$ 357,698,000	$ 36,926,000
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred rent and amortization of intangible assets, liabilities and lease inducements			(2,528,000)	(4,263,000)
Depreciation and amortization	13,472,000	17,724,000	45,464,000	54,262,000
Transfer of right to collect supplemental real estate tax reimbursements			(5,097,000)	0
Gain on sale of real estate	(74,715,000)	(14,927,000)	(378,732,000)	(39,666,000)
Impairment of real estate	0	0	13,100,000	0
Straight line rent, below-market ground lease and amortization of intangible assets			1,079,000	1,326,000
Straight line lease termination income			(2,041,000)	0
Amortization of deferred loan costs			1,691,000	2,508,000
Amortization of premiums and discounts on debt			(586,000)	(773,000)
Unrealized premium adjustment			1,747,000	1,240,000
Amortization and accretion on loans receivable, net			270,000	(912,000)
Bad debt expense (recovery)			411,000	(36,000)
Deferred income taxes			1,000	138,000
Stock-based compensation			116,000	114,000
Loans funded, held for sale to secondary market			(37,149,000)	(27,653,000)
Proceeds from sale of guaranteed loans			36,701,000	30,152,000
Principal collected on loans subject to secured borrowings			6,966,000	3,520,000
Other operating activity			(1,079,000)	634,000
Changes in operating assets and liabilities:
Accounts receivable and interest receivable			(1,414,000)	181,000
Other assets			(665,000)	(419,000)
Accounts payable and accrued expenses			(8,559,000)	(237,000)
Deferred leasing costs			(5,979,000)	(8,114,000)
Other liabilities			(3,031,000)	1,122,000
Due to related parties			(1,205,000)	192,000
Net cash provided by operating activities			17,179,000	50,242,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to investments in real estate			(19,075,000)	(27,051,000)
Proceeds from sale of real estate property, net			851,629,000	94,568,000
Loans funded			(12,383,000)	(51,156,000)
Principal collected on loans			7,686,000	31,979,000
Restricted cash			6,785,000	(33,037,000)
Other investing activity			93,000	1,101,000
Net cash provided by investing activities			834,735,000	16,404,000
CASH FLOWS FROM FINANCING ACTIVITIES:
(Payment of) proceeds from mortgages payable			(65,722,000)	388,766,000
Payment of unsecured revolving lines of credit, revolving credit facilities and term notes			(65,000,000)	(107,000,000)
Payment of principal on secured borrowings			(6,966,000)	(13,600,000)
Proceeds from secured borrowings			0	9,956,000
Payment of deferred preferred stock offering costs			(1,462,000)	(733,000)
Payment of deferred loan costs			(304,000)	(1,363,000)
Payment of common dividends			(32,854,000)	(58,930,000)
Payment of special cash dividends			(4,872,000)	0
Repurchase of Common Stock			(576,000,000)	(289,886,000)
Payment of borrowing costs			(8,000)	0
Net proceeds from issuance of Warrants			55,000	0	$ 60,000
Net proceeds from issuance of Series A Preferred Stock			11,594,000	0
Payment of preferred stock dividends			(112,000)	0
Noncontrolling interests' distributions			(37,000)	(36,000)
Net cash used in financing activities			(741,688,000)	(72,826,000)
Change in cash balances included in assets held for sale			(1,720,000)	925,000
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			108,506,000	(5,255,000)
CASH AND CASH EQUIVALENTS:
Beginning of period			144,449,000	139,101,000
End of period	252,955,000	133,846,000	252,955,000	133,846,000	252,955,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for interest			28,104,000	22,651,000
Federal income taxes paid			1,090,000	500,000
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Additions to investments in real estate included in accounts payable and accrued expenses			8,689,000	6,229,000
Net increase (decrease) in fair value of derivatives applied to other comprehensive income (loss)	333,000	3,272,000	1,445,000	(7,098,000)
Reduction of loans receivable and secured borrowings due to the SBA's repurchase of the guaranteed portion of a loan			534,000	2,663,000
Additions to deferred loan costs included in accounts payable and accrued expenses			0	626,000
Expenses related to repurchase of common stock included in accounts payable and accrued expenses			0	248,000
Additions to preferred stock offering costs included in accounts payable and accrued expenses			1,148,000	1,135,000
Accrual of dividends payable to preferred stockholders	$ 138,000	$ 0	138,000	0	$ 138,000
Preferred stock offering costs offset against redeemable preferred stock			$ 44,000	$ 0