Temporary Differences Between Financial Statement Carrying Amounts and Tax Bases of Assets and Liabilities that Give Rise to Significant Portions of Deferred Taxes (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current deferred income tax assets:
Provision for doubtful accounts	$ 3,691	$ 2,211
Accrued compensation	1,251	1,470
Other accrued expenses	45	186
Deferred revenue	758	1,200
Restructuring liability	1,029	1,023
Other	116	115
Current deferred income tax assets	6,890	6,205
Less: valuation allowance	(6,890)	(6,205)
Net current deferred income tax assets
Long-term deferred income tax assets:
Property and equipment	36,093	32,009
Goodwill	4,790	5,257
Intangible assets	(2,605)	4,538
Deferred revenue, less current portion	779	752
Restructuring liability, less current portion	1,856	2,004
Deferred rent	6,304	6,566
Stock-based compensation	1,660	1,417
U.S. net operating loss carryforwards	60,972	72,898
Foreign net operating loss carryforwards, less current portion	3,650	4,254
Capital loss carryforwards	2,271	2,271
Tax credit carryforwards	968	915
Other	1,881	2,046
Long-term deferred income tax assets	118,619	134,927
Less: valuation allowance	(116,523)	(132,488)
Net long-term deferred income tax assets	2,096	2,439
Net deferred tax assets	$ 2,096	$ 2,439