SUMMARIZED CONSOLIDATING INFORMATION - Schedule of Consolidating Statement of Cash Flows (Details) - USD ($) $ in Thousands					12 Months Ended
	Jun. 30, 2015	Oct. 03, 2014	May. 12, 2014	Mar. 21, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities					$ 121,101	$ 85,337	$ 62,099
Cash flows from investing activities:
Acquisitions of real estate					(461,330)	(771,479)	(125,955)
Origination and fundings of loans receivable					(49,687)	(66,397)	(165,960)
Preferred equity investments					(12,804)	(15,486)	(7,038)
Additions to real estate					(3,689)	(1,471)	(764)
Investment in Subsidiary					0	0
Distribution from Subsidiary					0	0	0
Intercompany financing					0	0	0
Repayment of loans receivable					5,803	1,097	0
Release of contingent consideration held in escrow					5,240	0	0
Net proceeds from sale of real estate					27,241	27,264	2,208
Net cash (used in) provided by in investing activities					(489,226)	(826,472)	(297,509)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes					0	499,250	200,000
Principal payments on senior unsecured notes					0	(211,250)	(113,750)
Net proceeds (repayments) from revolving credit facility					187,000	132,500	43,000
Proceeds from term loan					73,242	0	0
Proceeds from mortgage notes					28,735	57,703	0
Principal payments on mortgage notes					(3,132)	(89,110)	(10,994)
Payments of deferred financing costs					(1,452)	(19,131)	(8,954)
Payment of contingent consideration					0	0	(1,300)
Contributions by noncontrolling interests					179	0	0
Issuance of preferred stock				$ 138,300	0	0	138,249
Issuance of common stock	$ 147,900	$ 160,600	$ 219,100		139,403	510,147	34,517
Dividends paid on common and preferred stock					(109,897)	(81,489)	(58,151)
Contribution from Parent					0	0
Distribution to Parent					0	0	0
Intercompany financing					0	0	0
Net cash provided by (used in) financing activities					314,078	798,620	222,617
Net (decrease) increase in cash and cash equivalents					(54,047)	57,485	(12,793)
Effect of foreign currency translation on cash and cash equivalents					(312)	0	0
Cash and cash equivalents, beginning of period					61,793	4,308	17,101
Cash and cash equivalents, end of period					7,434	61,793	4,308
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities					112,291	53,292	47,810
Cash flows from investing activities:
Acquisitions of real estate					0	0	0
Origination and fundings of loans receivable					0	0	0
Preferred equity investments					0	0	0
Additions to real estate					(34)	(11)	0
Investment in Subsidiary					(414)	(12,147)
Distribution from Subsidiary					3,515	1,246	4,066
Intercompany financing					(200,884)	(415,790)	(178,015)
Repayment of loans receivable					0	0
Release of contingent consideration held in escrow					0
Net proceeds from sale of real estate					0	0	0
Net cash (used in) provided by in investing activities					(197,817)	(426,702)	(173,949)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes						0	0
Principal payments on senior unsecured notes						0	0
Net proceeds (repayments) from revolving credit facility					0	0	0
Proceeds from term loan					0
Proceeds from mortgage notes					0	0
Principal payments on mortgage notes					0	0	0
Payments of deferred financing costs					0	0	0
Payment of contingent consideration					0		0
Contributions by noncontrolling interests					0
Issuance of preferred stock					0		138,249
Issuance of common stock					139,403	510,147	34,517
Dividends paid on common and preferred stock					(109,897)	(81,489)	(58,151)
Contribution from Parent					0	0
Distribution to Parent					0	0	0
Intercompany financing					0	0	0
Net cash provided by (used in) financing activities					29,506	428,658	114,615
Net (decrease) increase in cash and cash equivalents					(56,020)	55,248	(11,524)
Effect of foreign currency translation on cash and cash equivalents					(231)
Cash and cash equivalents, beginning of period					58,799	3,551	15,075
Cash and cash equivalents, end of period					2,548	58,799	3,551
Issuers [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities					0	0	0
Cash flows from investing activities:
Acquisitions of real estate					0	0	0
Origination and fundings of loans receivable					0	0	0
Preferred equity investments					0	0	0
Additions to real estate					0	0	0
Investment in Subsidiary					(414)	(12,147)
Distribution from Subsidiary					3,515	1,246	4,066
Intercompany financing					(387,652)	(958,970)	(258,819)
Repayment of loans receivable					0	0
Release of contingent consideration held in escrow					0
Net proceeds from sale of real estate					0	0	0
Net cash (used in) provided by in investing activities					(384,551)	(969,871)	(254,753)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes						499,250	200,000
Principal payments on senior unsecured notes						(211,250)	(113,750)
Net proceeds (repayments) from revolving credit facility					187,000	268,000	0
Proceeds from term loan					0
Proceeds from mortgage notes					0	0
Principal payments on mortgage notes					0	0	0
Payments of deferred financing costs					(232)	(12,820)	(5,446)
Payment of contingent consideration					0		0
Contributions by noncontrolling interests					0
Issuance of preferred stock					0		0
Issuance of common stock					0	0	0
Dividends paid on common and preferred stock					0	0	0
Contribution from Parent					414	12,147
Distribution to Parent					(3,515)	(1,246)	(4,066)
Intercompany financing					200,884	415,790	178,015
Net cash provided by (used in) financing activities					384,551	969,871	254,753
Net (decrease) increase in cash and cash equivalents					0	0	0
Effect of foreign currency translation on cash and cash equivalents					0
Cash and cash equivalents, beginning of period					0	0	0
Cash and cash equivalents, end of period					0	0	0
Combined Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities					1,404	0	0
Cash flows from investing activities:
Acquisitions of real estate					(402,011)	(763,378)	(125,955)
Origination and fundings of loans receivable					(49,687)	(66,397)	(165,960)
Preferred equity investments					(12,804)	(15,486)	(7,038)
Additions to real estate					(1,286)	(1,437)	(764)
Investment in Subsidiary					0	0
Distribution from Subsidiary					0	0	0
Intercompany financing					0	0	0
Repayment of loans receivable					5,803	1,097
Release of contingent consideration held in escrow					5,240
Net proceeds from sale of real estate					27,241	27,264	0
Net cash (used in) provided by in investing activities					(427,504)	(818,337)	(299,717)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes						0	0
Principal payments on senior unsecured notes						0	0
Net proceeds (repayments) from revolving credit facility					0	(135,500)	43,000
Proceeds from term loan					73,242
Proceeds from mortgage notes					0	0
Principal payments on mortgage notes					0	0	0
Payments of deferred financing costs					(740)	(5,133)	(3,010)
Payment of contingent consideration					0		(1,300)
Contributions by noncontrolling interests					0
Issuance of preferred stock					0		0
Issuance of common stock					0	0	0
Dividends paid on common and preferred stock					0	0	0
Contribution from Parent					0	0
Distribution to Parent					0	0	0
Intercompany financing					354,674	958,970	261,027
Net cash provided by (used in) financing activities					427,176	818,337	299,717
Net (decrease) increase in cash and cash equivalents					1,076	0	0
Effect of foreign currency translation on cash and cash equivalents					(68)
Cash and cash equivalents, beginning of period					0	0	0
Cash and cash equivalents, end of period					1,008	0	0
Combined Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities					7,406	32,045	14,289
Cash flows from investing activities:
Acquisitions of real estate					(59,319)	(8,101)	0
Origination and fundings of loans receivable					0	0	0
Preferred equity investments					0	0	0
Additions to real estate					(2,369)	(23)	0
Investment in Subsidiary					0	0
Distribution from Subsidiary					0	0	0
Intercompany financing					0	0	0
Repayment of loans receivable					0	0
Release of contingent consideration held in escrow					0
Net proceeds from sale of real estate					0	0	2,208
Net cash (used in) provided by in investing activities					(61,688)	(8,124)	2,208
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes						0	0
Principal payments on senior unsecured notes						0	0
Net proceeds (repayments) from revolving credit facility					0	0	0
Proceeds from term loan					0
Proceeds from mortgage notes					28,735	57,703
Principal payments on mortgage notes					(3,132)	(89,110)	(10,994)
Payments of deferred financing costs					(480)	(1,178)	(498)
Payment of contingent consideration					0		0
Contributions by noncontrolling interests					179
Issuance of preferred stock					0		0
Issuance of common stock					0	0	0
Dividends paid on common and preferred stock					0	0	0
Contribution from Parent					414	12,147
Distribution to Parent					(3,515)	(1,246)	(4,066)
Intercompany financing					32,978	0	(2,208)
Net cash provided by (used in) financing activities					55,179	(21,684)	(17,766)
Net (decrease) increase in cash and cash equivalents					897	2,237	(1,269)
Effect of foreign currency translation on cash and cash equivalents					(13)
Cash and cash equivalents, beginning of period					2,994	757	2,026
Cash and cash equivalents, end of period					3,878	2,994	757
Elimination [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities					0	0	0
Cash flows from investing activities:
Acquisitions of real estate					0	0	0
Origination and fundings of loans receivable					0	0	0
Preferred equity investments					0	0	0
Additions to real estate					0	0	0
Investment in Subsidiary					828	24,294
Distribution from Subsidiary					(7,030)	(2,492)	(8,132)
Intercompany financing					588,536	1,374,760	436,834
Repayment of loans receivable					0	0
Release of contingent consideration held in escrow					0
Net proceeds from sale of real estate					0	0	0
Net cash (used in) provided by in investing activities					582,334	1,396,562	428,702
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes						0	0
Principal payments on senior unsecured notes						0	0
Net proceeds (repayments) from revolving credit facility					0	0	0
Proceeds from term loan					0
Proceeds from mortgage notes					0	0
Principal payments on mortgage notes					0	0	0
Payments of deferred financing costs					0	0	0
Payment of contingent consideration					0		0
Contributions by noncontrolling interests					0
Issuance of preferred stock					0		0
Issuance of common stock					0	0	0
Dividends paid on common and preferred stock					0	0	0
Contribution from Parent					(828)	(24,294)
Distribution to Parent					7,030	2,492	8,132
Intercompany financing					(588,536)	(1,374,760)	(436,834)
Net cash provided by (used in) financing activities					(582,334)	(1,396,562)	(428,702)
Net (decrease) increase in cash and cash equivalents					0	0	0
Effect of foreign currency translation on cash and cash equivalents					0
Cash and cash equivalents, beginning of period					0	0	0
Cash and cash equivalents, end of period					$ 0	$ 0	$ 0