CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Items, Net	Noncontrolling Interests
Balance at Dec. 31, 2012	$ 1,162,448	$ 1,900	$ 942,199	$ 185,558	$ 20,314	$ 12,477
Balance (in shares) at Dec. 31, 2012		190,005,788
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation, including tax benefit of $1,705 and $185 for the three months ended March 31, 2013 and 2014 respectively	12,608	6	12,602
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		606,077
Parent cash dividends declared	(52,448)			(52,448)
Currency translation adjustment	(14,947)				(14,962)	15
Net income (loss)	20,534			19,386		1,148
Noncontrolling interests equity contributions	464					464
Noncontrolling interests dividends	(582)					(582)
Balance at Mar. 31, 2013	1,128,077	1,906	954,801	152,496	5,352	13,522
Balance (in shares) at Mar. 31, 2013		190,611,865
Balance at Dec. 31, 2013	1,057,834	1,914	980,164	73,920	(8,660)	10,496
Balance (in shares) at Dec. 31, 2013	191,426,920	191,426,920
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation, including tax benefit of $1,705 and $185 for the three months ended March 31, 2013 and 2014 respectively	4,821	5	4,816
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		494,009
Parent cash dividends declared	(52,290)			(52,290)
Currency translation adjustment	1,788				1,677	111
Net income (loss)	42,109			41,667		442
Noncontrolling interests dividends	(196)					(196)
Purchase of noncontrolling interests	(2,895)		(395)			(2,500)
Balance at Mar. 31, 2014	$ 1,051,171	$ 1,919	$ 984,585	$ 63,297	$ (6,983)	$ 8,353
Balance (in shares) at Mar. 31, 2014	191,920,929	191,920,929