Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Estimated Useful Lives of Assets

Depreciation and amortization are provided on a straight-line basis over the estimated useful lives of the assets, which do not exceed the lease term for leasehold improvements, as follows:

Land improvements, building and building improvements	15 to 40 years
Furniture, fixtures and equipment	3 to 15 years
Leasehold improvements	5 to 10 years
Transportation	5 to 20 years

Estimated Retail Value of Promotional Allowances

The estimated retail value of such promotional allowances is included in operating revenues as follows (in thousands):

	Year Ended December 31,
	2012		2011		2010
Rooms	$	256,738	$	182,831	$	230,594
Food and beverage		185,292		169,576		141,925
Convention, retail and other		111,507		99,182		92,236
	$	553,537	$	451,589	$	464,755

Estimated Departmental Cost of Promotional Allowances

The estimated departmental cost of providing such promotional allowances, which is included primarily in casino operating expenses, is as follows (in thousands):

	Year Ended December 31,
	2012		2011		2010
Rooms	$	62,201	$	38,038	$	55,433
Food and beverage		140,403		119,238		91,215
Convention, retail and other		73,106		75,600		74,160
	$	275,710	$	232,876	$	220,808

Weighted Average Number of Common and Common Equivalent Shares Used in Calculation of Basic and Diluted Earnings Per Share

The weighted average number of common and common equivalent shares used in the calculation of basic and diluted earnings per share consisted of the following:

	Year Ended December 31,
	2012		2011		2010
Weighted average common shares outstanding (used in the calculation of basic earnings per share)		806,395,660		728,343,428		667,463,535
Potential dilution from stock options, warrants and restricted stock and stock units		18,160,376		83,473,259		124,297,089
Weighted average common and common equivalent shares (used in the calculation of diluted earnings per share)		824,556,036		811,816,687		791,760,624
Antidilutive stock options excluded from the calculation of diluted earnings per share		4,700,981		5,493,706		9,848,266