Company's Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011		Dec. 31, 2011
Segment Reporting Information [Line Items]
Revenues	$ 280,526	[1]	$ 293,310	[1]	$ 823,426	[1]	$ 893,033	[1]
Percentage of revenues	100.00%		100.00%		100.00%		100.00%
Depreciation and amortization	12,357	[1]	13,020	[1]	36,677	[1]	40,611	[1]
Income (loss) from continuing operations	8,672		22,082		32,067		54,730
Other (expense), net	(839)		(244)		(1,838)		(2,152)
Income taxes	309		(2,969)		(3,569)		(6,224)
Income from continuing operations, net of taxes	8,142		18,869		26,660		46,354
(Loss) from discontinued operations, net of taxes			(755)	[2]	(11,527)	[2]	(3,091)	[2]
Net income	8,142		18,114		15,133		43,263
Total assets	904,615		780,892		904,615		780,892		769,130
Americas [Member]
Segment Reporting Information [Line Items]
Revenues	237,541	[1]	241,481	[1]	688,841	[1]	735,559	[1]
Percentage of revenues	84.70%		82.30%		83.70%		82.40%
Depreciation and amortization	11,353	[1]	11,954	[1]	33,687	[1]	37,317	[1]
Income (loss) from continuing operations	21,654		30,950		69,388		89,353
(Loss) from discontinued operations, net of taxes					(6,302)	[2]
Total assets	1,265,146		1,150,752		1,265,146		1,150,752
EMEA [Member]
Segment Reporting Information [Line Items]
Revenues	42,985	[1]	51,829	[1]	134,585	[1]	157,474	[1]
Percentage of revenues	15.30%		17.70%		16.30%		17.60%
Depreciation and amortization	1,004	[1]	1,066	[1]	2,990	[1]	3,294	[1]
Income (loss) from continuing operations	2,359		1,893		1,861		1,171
(Loss) from discontinued operations, net of taxes			(755)	[2]	(5,225)	[2]	(3,091)	[2]
Total assets	1,073,201		1,174,224		1,073,201		1,174,224
Other [Member]
Segment Reporting Information [Line Items]
Income (loss) from continuing operations	(15,341)	[3]	(10,761)	[3]	(39,182)	[3]	(35,794)	[3]
Other (expense), net	(839)	[3]	(244)	[3]	(1,838)	[3]	(2,152)	[3]
Income taxes	309	[3]	(2,969)	[3]	(3,569)	[3]	(6,224)	[3]
Total assets	$ (1,433,732)	[3]	$ (1,544,084)	[3]	$ (1,433,732)	[3]	$ (1,544,084)	[3]

[1] Revenues and depreciation and amortization include results from continuing operations only.

[2] Includes the (loss) from discontinued operations, net of taxes, as well as the (loss) on sale of discontinued operations, net of taxes, if any.

[3] Other items (including corporate costs, impairment costs, other income and expense, and income taxes) are shown for purposes of reconciling to the Company's consolidated totals as shown in the tables above for the three and nine months ended September 30, 2012 and 2011. The accounting policies of the reportable segments are the same as those described in Note 1 to the accompanying Condensed Consolidated Financial Statements. Inter-segment revenues are not material to the Americas and EMEA segment results. The Company evaluates the performance of its geographic segments based on revenue and income (loss) from operations, and does not include segment assets or other income and expense items for management reporting purposes.