Consolidated Statements of Changes in Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Shares	Exchangeable Shares	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Earnings	Non-controlling interests
Balance at Jun. 30, 2011	$ 1,487,695	$ 543	$ 39,864	$ 1,319,697	$ 54	$ 100,004	$ 27,533
Balance (in shares) at Jun. 30, 2011		54,231,787	905,795
Issuance of common stock for:
Equity offering	267,433	40		267,393
Equity offering (in shares)		4,000,000
Exchange of exchangeable shares		1	(4,708)	4,707
Exchange of exchangeable shares (in shares)		106,969	(106,969)
2019 convertible senior notes, net of tax	47,605			47,605
Stock-based compensation and related share issuances	16,957	2		16,955
Stock-based compensation and related share issuances (in shares)		275,465
Net income	98,309					92,476	5,833
Other comprehensive income (loss)	(13,817)				(13,817)
Distribution to non-controlling interests	(8,396)						(8,396)
Dividends declared	(32,357)					(32,357)
Balance at Jun. 30, 2012	1,863,429	586	35,156	1,656,357	(13,763)	160,123	24,970
Balance (in shares) at Jun. 30, 2012		58,614,221	798,826
Issuance of common stock for:
Equity offering	471,868	53		471,815
Equity offering (in shares)		5,250,000
Exchange of exchangeable shares		1	(5,791)	5,790
Exchange of exchangeable shares (in shares)		131,597	(131,597)
Other	765			765
Stock-based compensation and related share issuances	7,448	2		7,446
Stock-based compensation and related share issuances (in shares)		188,218
Net income	73,409					69,153	4,256
Other comprehensive income (loss)	9,191				9,191
Distribution to non-controlling interests	(7,477)						(7,477)
Dividends declared	(47,997)					(47,997)
Balance at Jun. 30, 2013	2,370,636	642	29,365	2,142,173	(4,572)	181,279	21,749
Balance (in shares) at Jun. 30, 2013		64,184,036	667,229
Issuance of common stock for:
Exchange of exchangeable shares		3	(12,647)	12,644
Exchange of exchangeable shares (in shares)		287,372	(287,372)
Non-controlling interest assignment	(13,713)			(11,463)			(2,250)
Stock-based compensation and related share issuances	4,297	1		4,296
Stock-based compensation and related share issuances (in shares)		106,993
Net income	63,472					62,641	831
Other comprehensive income (loss)	4,412				4,412
Distribution to non-controlling interests	(2,498)						(2,498)
Dividends declared	(54,049)					(54,049)
Balance at Jun. 30, 2014	$ 2,372,557	$ 646	$ 16,718	$ 2,147,650	$ (160)	$ 189,871	$ 17,832
Balance (in shares) at Jun. 30, 2014		64,578,401	379,857