CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Statement - USD ($) $ in Thousands	Total	Common Class B [Member]	Common Stock [Member]	Series A Preferred Stock [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Additional Paid-in Capital [Member]
Common stock		$ 43	$ 676
Common Stock, Shares, Issued		4,339,431	67,596,515
Additional capital	$ 1,942,810
Retained Earnings (Accumulated Deficit)	2,601,662
Treasury Stock, Value	$ (938,335)
ERROR in label resolution.	(21,870,961)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (7,333)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(263,134)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)			$ 2				$ (1,421)
APIC, Share-based Payment Arrangement, Recognition and Exercise	(38)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	5,954
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ 0					$ 617	$ 2,209
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			165,641				15,330
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(35,289)
Net Income (Loss) Attributable to Parent	59,178
Dividends, Preferred Stock	(14,352)
Net Income (Loss) Attributable to Noncontrolling Interest						$ (24)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					$ 16,841
Net Income (Loss) Attributable to Parent	297,969
Net Income (Loss) Attributable to Noncontrolling Interest	665
Common stock		$ 43	$ 678
Common Stock, Shares, Issued		4,339,431	67,726,867
Additional capital	1,946,517
Retained Earnings (Accumulated Deficit)	2,645,871
Treasury Stock, Value	$ (939,756)
ERROR in label resolution.	(21,886,291)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (7,357)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(246,293)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)			$ 2				$ (7,942)
APIC, Share-based Payment Arrangement, Recognition and Exercise	(1)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	7,225
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ 0					49	88
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			194,615				74,698
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(1,520)
Net Income (Loss) Attributable to Parent	119,195
Dividends, Preferred Stock	(14,352)
Net Income (Loss) Attributable to Noncontrolling Interest						89
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					21,219
Common stock		$ 43	$ 680
Common Stock, Shares, Issued		4,339,431	67,919,962
Additional capital	1,953,653
Retained Earnings (Accumulated Deficit)	2,750,665
Treasury Stock, Value	$ (947,698)
ERROR in label resolution.	(21,960,989)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (7,268)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(225,074)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)			$ 2				$ (2,306)
APIC, Share-based Payment Arrangement, Recognition and Exercise	(2)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	9,605
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ (1)					4,162	1,887
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			187,770				19,858
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(58,214)
Net Income (Loss) Attributable to Parent	119,596
Dividends, Preferred Stock	(14,352)
Net Income (Loss) Attributable to Noncontrolling Interest	600					600
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					(50,277)
Common stock		$ 43	$ 681
Common Stock, Shares, Issued		4,339,431	68,049,518
Additional capital	1,961,369
Retained Earnings (Accumulated Deficit)	2,851,747
Treasury Stock, Value	$ (950,004)
ERROR in label resolution.	(21,980,847)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (6,668)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(275,351)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612
Common stock		$ 43	$ 682
Common Stock, Shares, Issued		4,339,431	68,162,297
Additional capital	1,969,332
Retained Earnings (Accumulated Deficit)	3,004,690
Treasury Stock, Value	$ (956,188)
ERROR in label resolution.	(22,026,922)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (6,313)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(236,035)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)			$ 4				$ (587)
APIC, Share-based Payment Arrangement, Recognition and Exercise	(10)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	8,911
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ (2)					8,136	7,832
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			365,833				858
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(129,869)
Net Income (Loss) Attributable to Parent	181,243
Dividends, Preferred Stock	(14,352)
Net Income (Loss) Attributable to Noncontrolling Interest						388
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					31,640
Net Income (Loss) Attributable to Parent	641,551
Net Income (Loss) Attributable to Noncontrolling Interest	1,439
Common stock		$ 43	$ 684
Common Stock, Shares, Issued		4,339,431	68,398,261
Additional capital	1,970,401
Retained Earnings (Accumulated Deficit)	3,163,445
Treasury Stock, Value	$ (956,775)
ERROR in label resolution.	(22,027,780)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (5,925)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(204,395)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)			$ 0				$ (311)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	15,823
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ 0					40
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			11,648				2,301
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(908)
Net Income (Loss) Attributable to Parent	220,706
Dividends, Preferred Stock	(14,352)
Stockholders' Equity, Other			$ 10				$ 3	1,177	(257)
Net Income (Loss) Attributable to Noncontrolling Interest						443
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					(79,373)
Common stock		$ 43	$ 694
Common Stock, Shares, Issued		4,339,431	68,409,001
Additional capital	1,985,967
Retained Earnings (Accumulated Deficit)	3,370,936
Treasury Stock, Value	$ (957,083)
ERROR in label resolution.	(22,030,081)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (5,482)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(283,768)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)			$ 2				$ (722)
APIC, Share-based Payment Arrangement, Recognition and Exercise	38
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	9,712
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ (1)					4,411	2,023
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			174,996				4,037
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(60,529)
Net Income (Loss) Attributable to Parent	239,602
Dividends, Preferred Stock	(14,352)
Stockholders' Equity, Other			$ (10)					$ (1,087)	$ 15
Net Income (Loss) Attributable to Noncontrolling Interest	608					$ 608
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					$ (146,732)
Common stock		$ 43	$ 685
Common Stock, Shares, Issued		4,339,431	68,523,468
Additional capital	1,993,709
Retained Earnings (Accumulated Deficit)	3,590,688
Treasury Stock, Value	$ (957,805)
ERROR in label resolution.	(22,026,044)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (4,874)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (430,500)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612