Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common shares / Share Capital	Additional paid-in capital	Subscriptions receivable	Retained earnings (deficit)	Shareholders' equity attributable to shareholders	Non-controlling interests
Balance at Dec. 31, 2011		$ 7,843	$ 756,219	$ (177,507)	$ (1,130)		$ 0
Balance (in shares) at Dec. 31, 2011		78,432,132
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common shares (in shares)		0
Issuance of common shares		0	(198)
Fair value of founder and advisor warrants			0
Fair value of warrants qualifying as shareholders' equity			0
Share compensation expense			4,595
Receipt of subscriptions due from shareholders				177,507
Net income	38,691				38,691
Income attributable to non-controlling interests	39,300						609
Contributions							5,002
Distributions							0
Balance at Sep. 30, 2012	811,631	7,843	760,616	0	37,561	806,020	5,611
Balance (in shares) at Sep. 30, 2012		78,432,132
Balance at Dec. 31, 2012	928,321	7,843	762,430	0	98,271		59,777
Balance (in shares) at Dec. 31, 2012		78,432,132
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common shares (in shares)		25,456,784
Issuance of common shares		2,546	283,460
Fair value of founder and advisor warrants			3,747
Fair value of warrants qualifying as shareholders' equity	(3,700)		(3,747)
Share compensation expense			7,611
Receipt of subscriptions due from shareholders				0
Net income	147,223				147,223
Income attributable to non-controlling interests	151,425						4,202
Contributions							26,164
Distributions							(35,129)
Balance at Sep. 30, 2013	$ 1,364,398	$ 10,389	$ 1,053,501	$ 0	$ 245,494	$ 1,309,384	$ 55,014
Balance (in shares) at Sep. 30, 2013		103,888,916