Consolidated Statements of Cash Flows - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 91,372,000	$ 858,000	$ 285,307,000	$ 27,841,000
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred rent and amortization of intangible assets, liabilities and lease inducements			(2,662,000)	(2,637,000)
Depreciation and amortization	14,761,000	18,480,000	31,992,000	36,538,000
Transfer of right to collect supplemental real estate tax reimbursements			(5,097,000)	0
Gain on sale of real estate	(116,283,000)	0	(304,017,000)	(24,739,000)
Impairment of real estate	13,100,000	0	13,100,000	0
Straight line rent, below-market ground lease and amortization of intangible assets			881,000	885,000
Amortization of deferred loan costs			808,000	1,967,000
Amortization of premiums and discounts on debt			(458,000)	(543,000)
Unrealized premium adjustment			722,000	835,000
Amortization and accretion on loans receivable, net			140,000	(419,000)
Bad debt expense (recovery)			187,000	(60,000)
Deferred income taxes			459,000	76,000
Stock-based compensation			78,000	65,000
Loans funded, held for sale to secondary market			(17,906,000)	(22,105,000)
Proceeds from sale of guaranteed loans			16,737,000	21,579,000
Principal collected on loans subject to secured borrowings			4,935,000	1,883,000
Other operating activity			(441,000)	1,020,000
Changes in operating assets and liabilities:
Accounts receivable and interest receivable			(2,682,000)	(1,574,000)
Other assets			(1,653,000)	(1,107,000)
Accounts payable and accrued expenses			5,631,000	(1,779,000)
Deferred leasing costs			(2,557,000)	(6,532,000)
Other liabilities			(1,748,000)	2,063,000
Due to related parties			4,000	301,000
Net cash provided by operating activities			21,760,000	33,558,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to investments in real estate			(9,915,000)	(18,121,000)
Proceeds from sale of real estate property, net			642,886,000	42,782,000
Loans funded			(5,969,000)	(27,871,000)
Principal collected on loans			5,496,000	26,164,000
Restricted cash			5,403,000	(76,956,000)
Other investing activity			67,000	1,042,000
Net cash provided by (used in) investing activities			637,968,000	(52,960,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
(Payment of) proceeds from mortgages payable			(65,569,000)	309,170,000
Payment of unsecured revolving lines of credit, revolving credit facilities and term notes			0	(107,000,000)
Payment of principal on secured borrowings			(4,935,000)	(11,965,000)
Proceeds from secured borrowings			0	9,956,000
Payment of deferred preferred stock offering costs			(862,000)	(362,000)
Payment of deferred loan costs			(4,000)	(1,076,000)
Payment of common dividends			(25,620,000)	(40,544,000)
Payment of special cash dividends			(4,872,000)	0
Repurchase of Common Stock			(576,000,000)	(210,060,000)
Net proceeds from issuance of Warrants			27,000	0	$ 32,000
Net proceeds from issuance of Series A Preferred Stock			5,645,000	0
Payment of preferred stock dividends			(40,000)	0
Noncontrolling interests' distributions			(37,000)	(36,000)
Net cash used in financing activities			(672,267,000)	(51,917,000)
Change in cash balances included in assets held for sale			(2,904,000)	(14,265,000)
NET DECREASE IN CASH AND CASH EQUIVALENTS			(15,443,000)	(85,584,000)
CASH AND CASH EQUIVALENTS:
Beginning of period			144,449,000	139,101,000	53,517,000
End of period	129,006,000	53,517,000	129,006,000	53,517,000	129,006,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for interest			19,303,000	13,717,000
Federal income taxes paid			259,000	50,000
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Additions to investments in real estate included in accounts payable and accrued expenses			6,883,000	9,392,000
Net increase (decrease) in fair value of derivatives applied to other comprehensive income (loss)	(440,000)	(2,445,000)	1,112,000	(10,370,000)
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	272,000
Proceeds receivable from closed mortgage loans included in other assets			0	80,687,000
Additions to preferred stock offering costs included in accounts payable and accrued expenses			1,387,000	984,000
Accrual of dividends payable to preferred stockholders	$ 72,000	$ 0	72,000	0	$ 72,000
Preferred stock offering costs offset against redeemable preferred stock			$ 21,000	$ 0