Consolidated Statement Of Changes In Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Preferred Stock [Member]	Additional paid-in capital [Member]	Treasury shares [Member]	Accumulated other comprehensive income (loss) [Member]	Distributions in excess of net income [Member]	Noncontrolling Interests [Member]
Balance (in shares) at Dec. 31, 2013		53,361,261	13,850,000
Other Changes During Period Shares		19,685
Stockholders' Equity, Other				$ (1,054)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total equity	1,927,718	589	139	2,280,104	(66,437)	13,557	(300,611)	377
Issuance of nonvested shares, net		280,193
Issuance of nonvested shares, net	(683)	(3)		(3,718)	(3,038)
Amortization of nonvested shares	(5,101)			(5,101)
Share option expense	1,085			1,085
Foreign currency translation adjustment	(11,221)					(11,221)
Change in unrealized gain/loss on derivatives	7,585					7,585
Net income	126,997						126,997
Issuances of common shares (in shares)		5,251,717
Issuances of common shares	264,140	52		264,088
Stock option exercises, net (in shares)	28,434	28,434
Stock option exercises, net	(27)	0		(1,195)	(1,222)
Dividends to common and preferred shareholders	(155,693)						(155,693)
Balance (in shares) at Sep. 30, 2014		58,941,290	13,850,000
Balance (in shares) at Jun. 30, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total equity	1,927,718		139					377
Foreign currency translation adjustment	(10,590)
Net income	$ 42,705
Balance (in shares) at Sep. 30, 2014			13,850,000