Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Advertising costs for the years ended December 31, 2015, 2014 and 2013, are reflected in the following table (in thousands):



	Years Ended December 31,
	2015		2014		2013
Advertising Costs	$	44,015	$	42,335	$	38,845

Depreciation Expense Computed Using Straight-Line Method over Useful Lives

Depreciation expense is computed using the straight-line method over the following useful lives:



Computer hardware	2 to 3 years
Computer software	2 to 5 years
Furniture and equipment	5 years
Leasehold improvements	Term of lease, 5 years maximum

Property and equipment consisted of the following (in thousands):



	December 31,
	2015			2014
Computer hardware	$	162,346		$	159,309
Computer software	339,634			312,968
Furniture and equipment	96,536			105,262
Leasehold improvements	118,491			113,782
Other	9,560			9,045
Property and equipment, cost	726,567			700,366
Accumulated depreciation	(583,661		)	(578,612		)
Property and equipment, net	$	142,906		$	121,754

Internal-Use Software Development Costs Capitalized

Internal-use software development costs capitalized for the years ended December 31, 2015, 2014 and 2013, are reflected in the following table (in thousands):



	Years Ended December 31,
	2015		2014		2013
Internal-use software development costs	$	31,964	$	24,367	$	13,027