SUMMARIZED CONDENSED CONSOLIDATING INFORMATION - Condensed Consolidating Statement of Cash Flows (unaudited) (Details) - USD ($) $ in Thousands				9 Months Ended
	Jun. 30, 2015	Oct. 03, 2014	May. 12, 2014	Sep. 30, 2015	Sep. 30, 2014
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities				$ 79,115	$ 71,239
Cash flows from investing activities:
Acquisitions of real estate				(386,572)	(721,879)
Origination and fundings of loans receivable				(26,207)	(59,256)
Preferred equity investments				(9,281)	(11,300)
Additions to real estate				(1,596)	(1,151)
DIP Financing				(3,302)	0
Release of contingent consideration held in escrow				5,240	0
Net proceeds from the sale of real estate					287
Repayment of loans receivable				3,285	287
Investment in subsidiaries				0	0
Net proceeds from the sale of real estate				15,752	0
Distribution from subsidiaries				0
Intercompany financing				0	0
Net cash used in investing activities				(402,681)	(793,299)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes				0	350,000
Principal payments on senior unsecured notes				0	(211,250)
Net proceeds (repayments) from revolving credit facility				136,000	478,500
Proceeds from term loan				73,242	0
Proceeds from mortgage notes				28,735	57,703
Principal payments on mortgage notes				(2,184)	(88,419)
Payments of deferred financing costs				(1,314)	(15,474)
Issuance of common stock	$ 147,900	$ 160,600	$ 219,100	139,617	229,825
Dividends paid on common and preferred stock				(80,619)	(57,654)
Contribution from parent				0	0
Distribution to parent				0
Intercompany financing				0	0
Net cash provided by (used in) financing activities				293,477	743,231
Net (decrease) increase in cash and cash equivalents				(30,089)	21,171
Effect of foreign currency translation on cash and cash equivalents				(231)	0
Cash and cash equivalents, beginning of period				61,793	4,308
Cash and cash equivalents, end of period				31,473	25,479
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities				74,256	40,289
Cash flows from investing activities:
Acquisitions of real estate				0	0
Origination and fundings of loans receivable				0	0
Preferred equity investments				0	0
Additions to real estate				(11)	0
DIP Financing				0
Release of contingent consideration held in escrow				0
Net proceeds from the sale of real estate					0
Repayment of loans receivable				0
Investment in subsidiaries				(414)	(12,288)
Net proceeds from the sale of real estate				0
Distribution from subsidiaries				1,355
Intercompany financing				(165,871)	(182,248)
Net cash used in investing activities				(164,941)	(194,536)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes					0
Principal payments on senior unsecured notes					0
Net proceeds (repayments) from revolving credit facility				0	0
Proceeds from term loan				0
Proceeds from mortgage notes				0	0
Principal payments on mortgage notes				0	0
Payments of deferred financing costs				0	0
Issuance of common stock				139,617	229,825
Dividends paid on common and preferred stock				(80,619)	(57,654)
Contribution from parent				0	0
Distribution to parent				0
Intercompany financing				0	0
Net cash provided by (used in) financing activities				58,998	172,171
Net (decrease) increase in cash and cash equivalents				(31,687)	17,924
Effect of foreign currency translation on cash and cash equivalents				(203)
Cash and cash equivalents, beginning of period				58,799	3,551
Cash and cash equivalents, end of period				26,909	21,475
Issuers [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities				0	0
Cash flows from investing activities:
Acquisitions of real estate				0	0
Origination and fundings of loans receivable				0	0
Preferred equity investments				0	0
Additions to real estate				0	0
DIP Financing				0
Release of contingent consideration held in escrow				0
Net proceeds from the sale of real estate					0
Repayment of loans receivable				0
Investment in subsidiaries				(414)	(12,288)
Net proceeds from the sale of real estate				0
Distribution from subsidiaries				1,355
Intercompany financing				(301,642)	(915,786)
Net cash used in investing activities				(300,701)	(928,074)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes					350,000
Principal payments on senior unsecured notes					(211,250)
Net proceeds (repayments) from revolving credit facility				136,000	604,000
Proceeds from term loan				0
Proceeds from mortgage notes				0	0
Principal payments on mortgage notes				0	0
Payments of deferred financing costs				(229)	(9,212)
Issuance of common stock				0	0
Dividends paid on common and preferred stock				0	0
Contribution from parent				414	12,288
Distribution to parent				(1,355)
Intercompany financing				165,871	182,248
Net cash provided by (used in) financing activities				300,701	928,074
Net (decrease) increase in cash and cash equivalents				0	0
Effect of foreign currency translation on cash and cash equivalents				0
Cash and cash equivalents, beginning of period				0	0
Cash and cash equivalents, end of period				0	0
Combined Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities				22	0
Cash flows from investing activities:
Acquisitions of real estate				(375,324)	(713,778)
Origination and fundings of loans receivable				(26,207)	(59,256)
Preferred equity investments				(9,281)	(11,300)
Additions to real estate				(1,100)	(1,128)
DIP Financing				(3,302)
Release of contingent consideration held in escrow				5,240
Net proceeds from the sale of real estate					$ 287
Repayment of loans receivable				3,285
Investment in subsidiaries				0
Net proceeds from the sale of real estate				15,752
Distribution from subsidiaries				0
Intercompany financing				0	$ 0
Net cash used in investing activities				(390,937)	(785,175)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes					0
Principal payments on senior unsecured notes					0
Net proceeds (repayments) from revolving credit facility				0	(125,500)
Proceeds from term loan				73,242
Proceeds from mortgage notes				0	0
Principal payments on mortgage notes				0	0
Payments of deferred financing costs				(714)	(5,111)
Issuance of common stock				0	0
Dividends paid on common and preferred stock				0	0
Contribution from parent				0	0
Distribution to parent				0
Intercompany financing				318,618	915,786
Net cash provided by (used in) financing activities				391,146	785,175
Net (decrease) increase in cash and cash equivalents				231	0
Effect of foreign currency translation on cash and cash equivalents				(20)
Cash and cash equivalents, beginning of period				0	0
Cash and cash equivalents, end of period				211	0
Combined Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities				4,837	30,950
Cash flows from investing activities:
Acquisitions of real estate				(11,248)	(8,101)
Origination and fundings of loans receivable				0	0
Preferred equity investments				0	0
Additions to real estate				(485)	(23)
DIP Financing				0
Release of contingent consideration held in escrow				0
Net proceeds from the sale of real estate					0
Repayment of loans receivable				0
Investment in subsidiaries				0	0
Net proceeds from the sale of real estate				0
Distribution from subsidiaries				0
Intercompany financing				0	0
Net cash used in investing activities				(11,733)	(8,124)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes					0
Principal payments on senior unsecured notes					0
Net proceeds (repayments) from revolving credit facility				0	0
Proceeds from term loan				0
Proceeds from mortgage notes				28,735	57,703
Principal payments on mortgage notes				(2,184)	(88,419)
Payments of deferred financing costs				(371)	(1,151)
Issuance of common stock				0	0
Dividends paid on common and preferred stock				0	0
Contribution from parent				414	12,288
Distribution to parent				(1,355)
Intercompany financing				(16,976)	0
Net cash provided by (used in) financing activities				8,263	(19,579)
Net (decrease) increase in cash and cash equivalents				1,367	3,247
Effect of foreign currency translation on cash and cash equivalents				(8)
Cash and cash equivalents, beginning of period				2,994	757
Cash and cash equivalents, end of period				4,353	4,004
Elimination [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities				0	0
Cash flows from investing activities:
Acquisitions of real estate				0	0
Origination and fundings of loans receivable				0	0
Preferred equity investments				0	0
Additions to real estate				0	0
DIP Financing				0
Release of contingent consideration held in escrow				0
Net proceeds from the sale of real estate					0
Repayment of loans receivable				0
Investment in subsidiaries				828	24,576
Net proceeds from the sale of real estate				0
Distribution from subsidiaries				(2,710)
Intercompany financing				467,513	1,098,034
Net cash used in investing activities				465,631	1,122,610
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes					0
Principal payments on senior unsecured notes					0
Net proceeds (repayments) from revolving credit facility				0	0
Proceeds from term loan				0
Proceeds from mortgage notes				0	0
Principal payments on mortgage notes				0	0
Payments of deferred financing costs				0	0
Issuance of common stock				0	0
Dividends paid on common and preferred stock				0	0
Contribution from parent				(828)	(24,576)
Distribution to parent				2,710
Intercompany financing				(467,513)	(1,098,034)
Net cash provided by (used in) financing activities				(465,631)	(1,122,610)
Net (decrease) increase in cash and cash equivalents				0	0
Effect of foreign currency translation on cash and cash equivalents				0
Cash and cash equivalents, beginning of period				0	0
Cash and cash equivalents, end of period				$ 0	$ 0