Statements of Condensed Consolidated Total Equity - USD ($) $ in Thousands	Total	Preferred shares at par value	Common shares at par value Class A common shares at par value	Common shares at par value Class B common shares at par value	Additional paid-in capital	(Accumulated deficit)/retained earnings	Accumulated other comprehensive income/(loss)	Class B common shares held by a subsidiary	Non-controlling interests
Balance at Dec. 31, 2013	$ 910,645	$ 0	$ 1,036	$ 181	$ 992,860	$ 7,643	$ (93,317)	$ (181)	$ 2,423
Increase (Decrease) in Stockholders' Equity
Share-based compensation	3,087				3,087
Exercised stock options and vested share awards	2		2
Comprehensive loss:
Net (losses)/earnings attributable to common shares	(14,648)					(14,675)			27
Other comprehensive loss	(41,014)						(40,165)		(849)
Balance at Jun. 30, 2014	858,072	0	1,038	181	995,947	(7,032)	(133,482)	(181)	1,601
Balance at Dec. 31, 2014	762,261	0	1,040	181	1,000,803	5,763	(246,420)	(181)	1,075
Increase (Decrease) in Stockholders' Equity
Share-based compensation	3,733				3,733
Exercised stock options and vested share awards	32		5		27
Repurchase of shares	(18,341)		(15)		(13,973)	(4,353)
Dividend to non-controlling interest	0
Comprehensive loss:
Net (losses)/earnings attributable to common shares	5,880					5,875			5
Other comprehensive loss	(40,272)						(40,119)		(153)
Balance at Jun. 30, 2015	$ 713,293	$ 0	$ 1,030	$ 181	$ 990,590	$ 7,285	$ (286,539)	$ (181)	$ 927