Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common stock	Contingent Convertible Preferred Stock	Restricted stock units	Additional paid-in capital	Exchangeable shares of subsidiary	Retained earnings	Accumulated other comprehensive income	Treasury Stock	Parent	Noncontrolling interests
Beginning Balance at Dec. 31, 2012		$ 365	$ 46,950	$ 107,253	$ 458,642	$ 1,958	$ 159,918	$ 6,624	$ (479,551)		$ 1,353
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		14			77,920
Contingent convertible preferred stock canceled or converted			(32,504)		0
Restricted stock units recognized, net of forfeitures				56,100
Restricted stock units delivered				(46,095)
Dividends							(56,225)
Tax benefit (expense)					(2,029)		2,037
Exchangeable shares of subsidiary delivered						0
Net income allocated to common stockholders	$ 46,682						46,682
Currency translation adjustment, net of tax	(15,985)							(15,985)
Repurchased									(55,406)
Distributions to noncontrolling interests											(311)
Ending Balance at Dec. 31, 2013	277,710	379	14,446	117,258	534,533	1,958	152,412	(9,361)	(534,957)	$ 276,668	1,042
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		10			66,591
Contingent convertible preferred stock canceled or converted			0		0
Restricted stock units recognized, net of forfeitures				39,990
Restricted stock units delivered				(67,141)
Dividends							(56,283)
Tax benefit (expense)					(4,661)		1,773
Exchangeable shares of subsidiary delivered						0
Net income allocated to common stockholders	43,388						43,388
Currency translation adjustment, net of tax	(8,608)							(8,608)
Repurchased									(36,179)
Distributions to noncontrolling interests											(348)
Ending Balance at Dec. 31, 2014	256,242	389	14,446	90,107	596,463	1,958	141,290	(17,969)	(571,136)	255,548	694
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		16			94,554
Contingent convertible preferred stock canceled or converted			(14,446)		14,446
Restricted stock units recognized, net of forfeitures				47,071
Restricted stock units delivered				(52,209)
Dividends							(58,940)
Tax benefit (expense)					(7,856)		1,912
Exchangeable shares of subsidiary delivered						0
Net income allocated to common stockholders	25,598						25,598
Currency translation adjustment, net of tax	(10,436)							(10,436)
Repurchased									(11,902)
Distributions to noncontrolling interests											0
Ending Balance at Dec. 31, 2015	$ 284,050	$ 405	$ 0	$ 84,969	$ 697,607	$ 1,958	$ 109,860	$ (28,405)	$ (583,038)	$ 283,356	$ 694