Costs Associated with Exit or Disposal Activities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Third Quarter 2010 Exit Plan [Member] | Lease obligations and facility exit costs [Member]
Summary of accrued liability associated with the company's exit plans
Beginning Accrual	$ 3,427	$ 6,141
Charges (reversals) of exit or disposal activities and related charges		220
Cash Payments	(477)	(742)
Other Non-Cash Charges
Ending Accrual	2,950	5,619
Short-term	523	1,953
Long-term	2,427	3,666
Fourth Quarter 2010 Exit Plan [Member] | Lease obligations and facility exit costs [Member]
Summary of accrued liability associated with the company's exit plans
Beginning Accrual	835	1,711
Charges (reversals) of exit or disposal activities and related charges		70
Cash Payments	(96)	(387)
Other Non-Cash Charges	25	58
Ending Accrual	764	1,452
Short-term	402	567
Long-term	362	885
ICT Restructuring Plan [Member]
Summary of accrued liability associated with the company's exit plans
Charges (reversals) of exit or disposal activities and related charges	0
Ending Accrual	0
ICT Restructuring Plan [Member] | Lease obligations and facility exit costs [Member]
Summary of accrued liability associated with the company's exit plans
Beginning Accrual		1,462
Charges (reversals) of exit or disposal activities and related charges		(262)
Cash Payments		(426)
Other Non-Cash Charges		43
Ending Accrual	0	817
Short-term		817
Long-term
Fourth Quarter 2011 Exit Plan [Member] | Americas [Member]
Summary of accrued liability associated with the company's exit plans
Ending Accrual	0
Fourth Quarter 2011 Exit Plan [Member] | EMEA [Member]
Summary of accrued liability associated with the company's exit plans
Beginning Accrual	5,060
Charges (reversals) of exit or disposal activities and related charges	999	0
Cash Payments	(418)
Other Non-Cash Charges	187
Ending Accrual	5,828
Short-term	5,828
Long-term
Fourth Quarter 2011 Exit Plan [Member] | EMEA [Member] | Lease obligations and facility exit costs [Member]
Summary of accrued liability associated with the company's exit plans
Beginning Accrual	577
Other Non-Cash Charges	18
Ending Accrual	595
Short-term	595
Long-term
Fourth Quarter 2011 Exit Plan [Member] | EMEA [Member] | Severance and related costs [Member]
Summary of accrued liability associated with the company's exit plans
Beginning Accrual	4,470
Charges (reversals) of exit or disposal activities and related charges	948
Cash Payments	(367)
Other Non-Cash Charges	168
Ending Accrual	5,219
Short-term	5,219
Long-term
Fourth Quarter 2011 Exit Plan [Member] | EMEA [Member] | Legal-related costs [Member]
Summary of accrued liability associated with the company's exit plans
Beginning Accrual	13
Charges (reversals) of exit or disposal activities and related charges	51
Cash Payments	(51)
Other Non-Cash Charges	1
Ending Accrual	14
Short-term	14
Long-term