Condensed, Consolidated Statements of Equity (Unaudited) (USD $) In Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income	Noncontrolling Interests
Beginning Balances at Dec. 31, 2012	$ 1,194,393	$ 88	$ 390,359	$ 791,209	$ 1,847	$ 10,890
Beginning Balances, shares at Dec. 31, 2012		88,372
Net income (excludes $238 and $473 in Q1 2013 and $151 and $368 in Q1 2014 related to redeemable and mandatorily redeemable noncontrolling interests, respectively)	31,112			30,485		627
Other comprehensive loss (excludes $318 related to mandatorily redeemable noncontrolling interest in Q1 2014)	(2,744)				(2,744)
Distribution to noncontrolling interests	(452)				0	(452)
Purchase of noncontrolling interests	(4,552)		(470)			(4,082)
Share-based compensation	3,770		3,770
Issuance of common stock under stock incentive plans, shares		128
Issuance of common stock under stock incentive plans	1,876		1,876
Stock repurchases, shares		(6)
Stock repurchases, value	(59)		(59)
Excess tax benefit from stock options	62		62
Tax benefit and other from stock options and awards	26		26
Ending Balances at Mar. 31, 2013	1,223,432	88	395,564	821,694	(897)	6,983
Ending Balances, shares at Mar. 31, 2013		88,494
Beginning Balances at Dec. 31, 2013	1,317,540	89	384,721	928,720	(6,190)	10,200
Beginning Balances, shares at Dec. 31, 2013		88,508
Net income (excludes $238 and $473 in Q1 2013 and $151 and $368 in Q1 2014 related to redeemable and mandatorily redeemable noncontrolling interests, respectively)	34,396			34,043		353
Other comprehensive loss (excludes $318 related to mandatorily redeemable noncontrolling interest in Q1 2014)	(5,521)				(5,093)	(110)
Dissolution of noncontrolling interests	81					81
Distribution to noncontrolling interests	(502)					(502)
Purchase of noncontrolling interests	30		30
Share-based compensation	4,544		4,544
Issuance of common stock under stock incentive plans, shares		87
Issuance of common stock under stock incentive plans	372		372
Stock repurchases, shares		(307)
Stock repurchases, value	(9,793)	(1)	(9,792)
Excess tax benefit from stock options	392		392
Other Comprehensive Income Net Of Tax, excluding mandatorily redeemable partnership interests	(5,203)
Ending Balances at Mar. 31, 2014	$ 1,341,857	$ 88	$ 380,267	$ 962,763	$ (11,283)	$ 10,022
Ending Balances, shares at Mar. 31, 2014		88,288