Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred shares	Common shares	Treasury shares	Additional paid-in capital	Accumulated other comprehensive loss	Retained earnings
Total shareholders' equity						$ (617)
Balance - Beginning of period at Dec. 31, 2013		$ 0	$ 27,036	$ (10,228)	$ 1,677,894	(617)	$ 2,010,009
Preferred shares issued		0
Common shares issued, net			186		5,161
Offering expenses on preferred shares					0
Repurchase of common shares				(2,317)	(508,635)
Share compensation expenses					33,073
Other comprehensive loss	$ (7,939)					(7,939)
Net income	554,843						554,843
Net (income) attributable to noncontrolling interests	(74,880)						(74,880)
Dividends on common shares							(117,000)
Dividends on preferred shares							0
Balance - End of period at Dec. 31, 2014	3,586,586	0	27,222	(12,545)	1,207,493	(8,556)	2,372,972
Noncontrolling interests	292,274
Total shareholders' equity	3,878,860					(8,556)
Preferred shares issued		0
Common shares issued, net			878		16,529
Offering expenses on preferred shares					0
Repurchase of common shares				(1,047)	(259,383)
Share compensation expenses					38,341
Other comprehensive loss	(4,013)					(4,013)
Net income	467,857						467,857
Net (income) attributable to noncontrolling interests	(92,964)						(92,964)
Dividends on common shares							(113,809)
Dividends on preferred shares							0
Balance - End of period at Dec. 31, 2015	3,638,975	0	28,100	(13,592)	1,002,980	(12,569)	2,634,056
Noncontrolling interests	154,662
Total shareholders' equity	3,793,637					(12,569)
Preferred shares issued		150,000
Common shares issued, net			124		(7,825)
Offering expenses on preferred shares					(5,148)
Repurchase of common shares				(784)	(211,891)
Share compensation expenses					42,907
Other comprehensive loss	(10,647)					(10,647)
Net income	487,202						487,202
Net (income) attributable to noncontrolling interests	(123,363)						(123,363)
Dividends on common shares							(116,804)
Dividends on preferred shares							(4,455)
Balance - End of period at Dec. 31, 2016	3,838,291	$ 150,000	$ 28,224	$ (14,376)	$ 821,023	(23,216)	$ 2,876,636
Noncontrolling interests	165,977
Total shareholders' equity	$ 4,004,268					$ (23,216)