Segment Information (Tables)

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

Reconciliation of Adjusted EBITDA to Net Income

The following table is a reconciliation of Adjusted EBITDA to net income, the most directly comparable financial measure calculated and presented in accordance with GAAP, for the periods presented (in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2013			2012			2013			2012
Adjusted EBITDA	$	104,422		$	107,059		$	326,601		$	288,169
Depreciation (1)		(7,634	)		(5,037	)		(20,834	)		(14,033	)
Amortization of intangible assets		(1,443	)		(1,310	)		(4,182	)		(4,909	)
Stock-based compensation		(11,651	)		(8,463	)		(35,470	)		(19,923	)
Other expense, net		(71	)		(1,439	)		(8,154	)		(10,619	)
Provision for income taxes		(27,741	)		(31,275	)		(72,792	)		(77,814	)
Net income	$	55,882		$	59,535		$	185,169		$	160,871

(1) Includes amortization of internal use software and website development costs.