Share Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Share Based Compensation [Abstract]

Valuation and Expense Information

Valuation and Expense Information
		Year Ended December 31,
		2011		2010		2009
Total cost of share-based payment plans	$	21,688	$	21,805	$	18,872
Amounts capitalized in fixed assets	$	7,769	$	8,861	$	7,971
Amounts charged against income, before
income tax benefit	$	13,919	$	12,944	$	10,901
Amount of related income tax benefit recognized
in income	$	4,997	$	4,595	$	3,826

Schedule Of Securities Authorized For Issuance Under Equity Compensation Plans [Text Block]

			Number of Securities
			Remaining Available
	Number of		for Future Issuance
	Securities to	Weighted	Under Equity
	be Issued	Average	Compensation Plans
	Upon Exercise of	Exercise Price of	(Excluding Securities
	Outstanding	Outstanding	Reflected in the
Plan Category	Options	Options	First Column)
Equity compensation plans approved by
security holders	1,459	$ 48.29	3,554
Equity compensation plans not approved
by security holders	n/a	n/a	n/a
Total	1,459	$48.29	3,554

Changes in Stock Options Outstanding

		Weighted
		Average
	Number of	Exercise Price
	Options	(US$)
Balance, December 31, 2008	4,213	$ 0.25	to	$ 98.87
Forfeited	(43)	$ 51.60	to	$ 78.55
Exercised	(666)	$ 0.25	to	$ 33.57
Balance, December 31, 2009	3,504	$ 1.49	to	$ 98.87
Forfeited	(68)	$ 51.60	to	$ 76.01
Exercised	(1,206)	$ 1.49	to	$ 45.95
Balance, December 31, 2010	2,230	$ 3.91	to	$ 98.87
Forfeited	(99)	$ 51.60	to	$ 75.18
Exercised	(672)	$ 3.91	to	$ 33.57
Balance, December 31, 2011	1,459	$ 16.97	to	$ 98.87

Share Based Compensation by Exercise Price Table

The following tables summarize information about the stock options outstanding at December 31, 2011:
					Options Outstanding
						Weighted
						Average	Weighted
					Number	Remaining	Average	Aggregate
Range of Exercise Price					Outstanding	Contractual Life	Exercise Price	Intrinsic Value
						(Years)
$	16.97	-	$	19.18	70	2.37	$ 17.44	$ 853
$	25.08	-	$	55.58	637	3.60	$ 38.69	$ 179
$	46.05	-	$	65.04	179	4.53	$ 56.67	$ -
$	49.05	-	$	65.94	373	5.31	$ 54.58	$ -
$	51.14	-	$	98.87	200	6.40	$ 70.51	$ -
					Options Exercisable
						Weighted
						Average	Weighted
					Number	Remaining	Average	Aggregate
Range of Exercise Price					Outstanding	Contractual Life	Exercise Price	Intrinsic Value
						(Years)
$	16.97	-	$	19.18	70	2.37	$ 17.44	$ 853
$	25.08	-	$	55.58	637	3.60	$ 38.69	$ 179
$	46.05	-	$	65.04	179	4.53	$ 56.67	$ -
$	49.05	-	$	65.94	373	5.31	$ 54.58	$ -
$	51.14	-	$	98.87	200	6.40	$ 70.51	$ -

Schedule Of Grant Date Fair Value Of Options Granted Vested And Forfeited During Year [Text Block]

		2011		2010		2009
Non-vested share options at beginning of year	$	30.72	$	26.28	$	26.18
Non-vested share options at end of year	$	-	$	30.72	$	26.28
Options vested during the year	$	30.73	$	23.86	$	25.07
Options forfeited during the year	$	25.80	$	28.36	$	29.57