Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 291,623,000	$ 622,000
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred rent and amortization of intangible assets, liabilities and lease inducements	(193,000)	(1,388,000)
Depreciation and amortization	9,630,000	13,148,000
Reclassification from AOCI to interest expense	(1,806,000)	0
Reclassification from other assets to interest expense for swap termination	1,421,000	0
Change in fair value of swaps	209,000	0
Gain on sale of real estate	(377,581,000)	0
Impairment of real estate (Note 3)	66,200,000	0
Loss on early extinguishment of debt	25,071,000	0
Straight-line rent expense	0	(11,000)
Amortization of deferred loan costs	309,000	176,000
Amortization of premiums and discounts on debt	4,000	(34,000)
Unrealized premium adjustment	442,000	891,000
Amortization and accretion on loans receivable, net	(98,000)	(99,000)
Bad debt (recovery) expense	(98,000)	109,000
Deferred income taxes	95,000	58,000
Stock-based compensation	38,000	38,000
Loans funded, held for sale to secondary market	(2,553,000)	(8,731,000)
Proceeds from sale of guaranteed loans	11,286,000	17,113,000
Principal collected on loans subject to secured borrowings	112,000	510,000
Other operating activity	(49,000)	(193,000)
Changes in operating assets and liabilities:
Accounts receivable and interest receivable	740,000	2,834,000
Other assets	959,000	(5,115,000)
Accounts payable and accrued expenses	(4,041,000)	(1,998,000)
Deferred leasing costs	(262,000)	(1,040,000)
Other liabilities	(5,026,000)	(8,000)
Due to related parties	(1,723,000)	826,000
Net cash provided by operating activities	14,709,000	17,708,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to investments in real estate	(12,623,000)	(4,119,000)
Acquisition of real estate	0	(112,048,000)
Proceeds from sale of real estate, net	652,891,000	0
Loans funded	(851,000)	(2,910,000)
Principal collected on loans	2,252,000	3,679,000
Other investing activity	23,000	49,000
Net cash provided by (used in) investing activities	641,692,000	(115,349,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payment of unsecured revolving lines of credit, revolving credit facility and term note	(130,000,000)	0
Payment of mortgages payable	(46,000,000)	(510,000)
Investments in marketable securities in connection with the legal defeasance of mortgages payable	(224,086,000)	0
Proceeds from revolving credit facility	0	10,000,000
Payment of principal on loan-backed notes	(3,271,000)	0
Payment of principal on secured borrowings	(112,000)	0
Prepayment penalties and other payments for early extinguishment of debt	(5,562,000)	0
Proceeds from secured borrowings	0	773,000
Payment of deferred preferred stock offering costs	(126,000)	(404,000)
Payment of other deferred costs	(82,000)	0
Payment of common dividends	(5,474,000)	(5,473,000)
Payment of special cash dividends	0	(1,575,000)
Net proceeds from issuance of Series A Preferred Warrants	9,000	17,000
Net proceeds from issuance of Series A Preferred Stock	7,019,000	8,975,000
Payment of preferred stock dividends	(14,935,000)	(249,000)
Redemption of Series A Preferred Stock	(67,000)	(37,000)
Net cash (used in) provided by financing activities	(422,687,000)	11,517,000
Change in cash balances included in assets held for sale	10,000	0
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	233,724,000	(86,124,000)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Beginning of period	77,443,000	156,318,000
End of period	311,167,000	70,194,000
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH TO THE CONSOLIDATED BALANCE SHEETS:
Total cash and cash equivalents and restricted cash	77,443,000	156,318,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for interest	5,734,000	6,603,000
Federal income taxes paid	0	0
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Additions to investments in real estate included in accounts payable and accrued expenses	2,457,000	14,096,000
Net increase in fair value of derivatives applied to other comprehensive income	0	1,183,000
Additions to deferred costs included in accounts payable and accrued expenses	145,000	837,000
Additions to preferred stock offering costs included in accounts payable and accrued expenses	281,000	0
Preferred stock offering costs offset against redeemable preferred stock in temporary equity	44,000	61,000
Reclassification of Series A Preferred Stock from temporary equity to permanent equity	8,890,000	1,885,000
Reclassification of loans receivable, net to real estate owned	243,000	0
Right-of use asset and lease liability	298,000
Marketable securities transferred in connection with the legal defeasance of mortgages payable	224,086,000	0
Mortgage notes payable legally defeased	205,500,000	0
Mortgage note assumed in connection with our sale of real estate	$ 28,200,000	$ 0