Condensed Consolidating Financial Information - Condensed Consolidated Statements of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating activities
Net cash provided by (used in) operating activities	$ 140,801	$ 105,309	$ 79,270
Investing Activities
Principal received on loans receivable	7,249	10,931	4,289
Investments in loans receivable	(3,746)	(1,293)	(861)
Net cash (used for) provided by investing activities	(712,577)	(617,128)	(265,621)
Financing Activities
Additions to term debt	424,580	300,000	450,000
Payments of term debt	(11,249)	(232)	(246,262)
Revolving credit facilities, net	(20,000)	35,400	89,600
Distributions paid	(120,309)	(103,952)	(89,601)
Lease deposits and other obligations to tenants	3,231	(11,436)	8,621
Proceeds from sale of common shares, net of offering costs	313,331	233,048
Debt issuance costs paid and other financing activities		(177)	(6,235)
Net cash provided by (used in) financing activities	579,824	446,404	190,669
Increase (decrease) in cash and cash equivalents for period	8,048	(65,415)	4,318
Cash and cash equivalents at beginning of period	37,311	102,726	98,408
Cash and cash equivalents at end of period	45,979	37,311	102,726
Parent [Member]
Operating activities
Net cash provided by (used in) operating activities	4	57	(209)
Investing Activities
Cash paid for acquisitions and other related investments
Net proceeds from sales of real estate
Principal received on loans receivable
Investments in loans receivable
Construction in progress and other
Net cash (used for) provided by investing activities
Financing Activities
Additions to term debt
Payments of term debt
Revolving credit facilities, net
Distributions paid	(120,038)	(103,684)	(89,342)
Net payments relating to intercompany financing	(193,297)	(129,421)	89,551
Proceeds from sale of common shares, net of offering costs	313,331	233,048
Debt issuance costs paid and other financing activities
Net cash provided by (used in) financing activities	(4)	(57)	209
Increase (decrease) in cash and cash equivalents for period
Effect of exchange rate changes
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Subsidiary Issuers [Member]
Operating activities
Net cash provided by (used in) operating activities	(53,846)	(61,002)	(48,779)
Investing Activities
Cash paid for acquisitions and other related investments
Net proceeds from sales of real estate
Principal received on loans receivable
Investments in loans receivable
Construction in progress and other	136	(578)	(6,466)
Net cash (used for) provided by investing activities	136	(578)	(6,466)
Financing Activities
Additions to term debt	424,580	300,000	450,000
Payments of term debt	(11,000)		(237,666)
Revolving credit facilities, net	(20,000)	75,000	50,000
Distributions paid	(120,309)	(103,952)	(89,601)
Net payments relating to intercompany financing	(539,776)	(501,839)	92,052
Proceeds from sale of common shares, net of offering costs	313,331	233,048
Debt issuance costs paid and other financing activities	(9,760)	(6,424)	(21,028)
Net cash provided by (used in) financing activities	37,066	(4,167)	59,653
Increase (decrease) in cash and cash equivalents for period	(16,644)	(65,747)	4,408
Effect of exchange rate changes	(24)
Cash and cash equivalents at beginning of period	35,483	101,230	96,822
Cash and cash equivalents at end of period	18,815	35,483	101,230
Subsidiary Guarantors [Member]
Operating activities
Net cash provided by (used in) operating activities	196,883	165,454	109,329
Investing Activities
Cash paid for acquisitions and other related investments	(619,092)	(420,500)	(241,626)
Net proceeds from sales of real estate
Principal received on loans receivable		5,491	230
Investments in loans receivable	(1,100)		(230)
Construction in progress and other	(94,737)	(66,467)	(24,081)
Net cash (used for) provided by investing activities	(714,929)	(481,476)	(265,707)
Financing Activities
Additions to term debt
Payments of term debt			(8,433)
Revolving credit facilities, net		(39,600)	39,600
Distributions paid
Lease deposits and other obligations to tenants	1,606	(10,031)	10,986
Net payments relating to intercompany financing	541,325	365,809	114,247
Proceeds from sale of common shares, net of offering costs
Debt issuance costs paid and other financing activities
Net cash provided by (used in) financing activities	542,931	316,178	156,400
Increase (decrease) in cash and cash equivalents for period	24,885	156	22
Effect of exchange rate changes	644
Cash and cash equivalents at beginning of period	1,565	1,409	1,387
Cash and cash equivalents at end of period	27,094	1,565	1,409
Non-Guarantor Subsidiaries [Member]
Operating activities
Net cash provided by (used in) operating activities	(2,240)	800	18,929
Investing Activities
Cash paid for acquisitions and other related investments	(35,830)	(200,990)	(37,337)
Net proceeds from sales of real estate	32,409	71,202	41,130
Principal received on loans receivable	7,249	5,440	4,059
Investments in loans receivable	(2,646)	(1,293)	(631)
Construction in progress and other	1,034	(9,433)	(669)
Net cash (used for) provided by investing activities	2,216	(135,074)	6,552
Financing Activities
Additions to term debt
Payments of term debt	(249)	(232)	(163)
Revolving credit facilities, net
Distributions paid
Lease deposits and other obligations to tenants	1,625	(1,405)	(2,365)
Net payments relating to intercompany financing	(1,545)	136,087	(22,404)
Proceeds from sale of common shares, net of offering costs
Debt issuance costs paid and other financing activities			(661)
Net cash provided by (used in) financing activities	(169)	134,450	(25,593)
Increase (decrease) in cash and cash equivalents for period	(193)	176	(112)
Effect of exchange rate changes
Cash and cash equivalents at beginning of period	263	87	199
Cash and cash equivalents at end of period	70	263	87
Eliminations [Member]
Operating activities
Net cash provided by (used in) operating activities
Investing Activities
Cash paid for acquisitions and other related investments
Net proceeds from sales of real estate
Principal received on loans receivable
Investments in loans receivable
Construction in progress and other
Net cash (used for) provided by investing activities
Financing Activities
Additions to term debt
Payments of term debt
Revolving credit facilities, net
Distributions paid	120,038	103,684	89,342
Lease deposits and other obligations to tenants
Net payments relating to intercompany financing	193,293	129,364	(89,342)
Proceeds from sale of common shares, net of offering costs	(313,331)	(233,048)
Debt issuance costs paid and other financing activities
Net cash provided by (used in) financing activities
Increase (decrease) in cash and cash equivalents for period
Effect of exchange rate changes
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Total Consolidated [Member]
Operating activities
Net cash provided by (used in) operating activities	140,801	105,309	79,270
Investing Activities
Cash paid for acquisitions and other related investments	(654,922)	(621,490)	(278,963)
Net proceeds from sales of real estate	32,409	71,202	41,130
Principal received on loans receivable	7,249	10,931	4,289
Investments in loans receivable	(3,746)	(1,293)	(861)
Construction in progress and other	(93,567)	(76,478)	(31,216)
Net cash (used for) provided by investing activities	(712,577)	(617,128)	(265,621)
Financing Activities
Additions to term debt	424,580	300,000	450,000
Payments of term debt	(11,249)	(232)	(246,262)
Revolving credit facilities, net	(20,000)	35,400	89,600
Distributions paid	(120,309)	(103,952)	(89,601)
Lease deposits and other obligations to tenants	3,231	(11,436)	8,621
Net payments relating to intercompany financing
Proceeds from sale of common shares, net of offering costs	313,331	233,048
Debt issuance costs paid and other financing activities	(9,760)	(6,424)	(21,689)
Net cash provided by (used in) financing activities	579,824	446,404	190,669
Increase (decrease) in cash and cash equivalents for period	8,048	(65,415)	4,318
Effect of exchange rate changes	620
Cash and cash equivalents at beginning of period	37,311	102,726	98,408
Cash and cash equivalents at end of period	$ 45,979	$ 37,311	$ 102,726