PROPERTY AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2011

Property and Equipment

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

	December 31,
	2011			2010
Network equipment	$	121,705		$	113,593
Network equipment under capital lease		1,417			1,426
Furniture and equipment		24,508			13,002
Software		29,625			25,748
Leasehold improvements		231,391			191,915
Buildings under capital lease		36,028			18,668
Property and equipment, gross		444,674			364,352
Less: accumulated depreciation and amortization ($6,353 and $3,267 related to capital leases at December 31, 2011 and 2010, respectively)		(246,305	)		(222,063	)
	$	198,369		$	142,289

Summary of Depreciation and Amortization of Property and Equipment Associated with Direct Costs of Network, Sales and Services and Other Depreciation Expense

We summarize depreciation and amortization of property and equipment associated with direct costs of network, sales and services and other depreciation expense as follows (in thousands):

	Year ended December 31,
	2011		2010		2009
Direct costs of network, sales and services	$	36,040	$	26,930	$	22,134
Other depreciation and amortization		886		3,228		6,148
Subtotal		36,926		30,158		28,282
Amortization of acquired technologies(1)		3,500		3,811		8,349
Total depreciation and amortization	$	40,426	$	33,969	$	36,631

(1) Amortization of acquired technologies during the year ended December 31, 2009 included impairment charges of $4.1 million for acquired CDN advertising technology.