Consolidated Statements of Changes in Equity (USD $) In Thousands, unless otherwise specified	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, 2010		$ 351	$ 46,950	$ 89,365	$ 368,090	$ 6,578	$ 184,621	$ 5,127	$ (330,602)		$ 2,382
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		7	0		42,794
Restricted stock units recognized				53,143
Restricted stock units delivered				(42,592)
Tax benefit (expense) from the delivery of restricted stock units					1,399		1,856
Exchangeable shares of subsidiary delivered						0
Dividends							(57,680)
Net income allocated to common stockholders	44,578						44,577
Currency translation adjustment, net of tax	(1,999)							(1,999)
Repurchased									(65,784)
Net income allocated to noncontrolling interests	6										6
Distributions to noncontrolling interests											(1,035)
Ending Balance at Dec. 31, 2011	347,554	358	46,950	99,916	412,283	6,578	173,374	3,128	(396,386)	346,201	1,353
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		7	0		51,306
Restricted stock units recognized				54,178
Restricted stock units delivered				(46,841)
Tax benefit (expense) from the delivery of restricted stock units					(4,947)		1,581
Exchangeable shares of subsidiary delivered						(4,620)
Dividends							(57,129)
Net income allocated to common stockholders	42,092						42,092
Currency translation adjustment, net of tax	3,496							3,496
Repurchased									(83,165)
Net income allocated to noncontrolling interests	0										0
Distributions to noncontrolling interests											0
Ending Balance at Dec. 31, 2012	303,512	365	46,950	107,253	458,642	1,958	159,918	6,624	(479,551)	302,159	1,353
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		14	(32,504)		77,920
Restricted stock units recognized				56,100
Restricted stock units delivered				(46,095)
Tax benefit (expense) from the delivery of restricted stock units					(2,029)		2,037
Exchangeable shares of subsidiary delivered						0
Dividends							(56,225)
Net income allocated to common stockholders	46,682						46,682
Currency translation adjustment, net of tax	(15,985)							(15,985)
Repurchased									(55,406)
Net income allocated to noncontrolling interests	0										0
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