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 (Loss)	Treasury Stock	Parent	Noncontrolling Interests
Beginning Balance at Dec. 31, 2013		$ 379	$ 14,446	$ 117,258	$ 534,533	$ 1,958	$ 152,412	$ (9,361)	$ (534,957)		$ 1,042
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued		10			66,591
Convertible Preferred Stock Converted to Other Securities			0
Restricted stock units recognized, net of forfeitures				39,990
Restricted stock units delivered				(67,141)
Tax (expense) from the delivery of restricted stock units					(4,661)
Exchangeable shares of subsidiary delivered						0
Dividends							(56,283)
Tax benefit from payment of restricted stock unit dividends							1,773
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest							43,388
Currency translation adjustment, net of tax								(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]
Stock issued		7			46,051
Convertible Preferred Stock Converted to Other Securities			0
Restricted stock units recognized, net of forfeitures				11,432
Restricted stock units delivered				(46,176)
Tax (expense) from the delivery of restricted stock units					(7,336)
Exchangeable shares of subsidiary delivered						0
Dividends							(14,480)
Tax benefit from payment of restricted stock unit dividends							488
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	7,603						7,603
Currency translation adjustment, net of tax	(7,039)							(7,039)
Repurchased									(10,561)
Distributions to noncontrolling interests											0
Ending Balance at Mar. 31, 2015	$ 236,231	$ 396	$ 14,446	$ 55,363	$ 635,178	$ 1,958	$ 134,901	$ (25,008)	$ (581,697)	$ 235,537	$ 694