Fair Value Information for Financial Assets and Liabilities, as well as Cost or Amortized Cost (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011
Current assets:
Cash equivalents (including restricted cash accounts)	$ 43,371		$ 61,649
Marketable Securities	15,719		18,521
Derivatives	296	[1]
Current liabilities:
Derivatives			(890)	[2]
Assets, Net, Total	59,386		79,280
Cost Or Amortized Cost
Current assets:
Cash equivalents (including restricted cash accounts)	43,371		61,649
Marketable Securities	15,453		18,284
Current liabilities:
Assets, Net, Total	58,824		79,933
Fair Value, Inputs, Level 1
Current assets:
Cash equivalents (including restricted cash accounts)	43,371		61,649
Marketable Securities	15,719		18,521
Current liabilities:
Assets, Net, Total	59,090		80,170
Fair Value, Inputs, Level 2
Current assets:
Derivatives	296	[1]
Current liabilities:
Derivatives			(890)	[2]
Assets, Net, Total	$ 296		$ (890)

[1] Amounts relating to derivatives which represent currency forward contracts which are valued primarily based on observable inputs, including forward and spot prices for currencies which are netted against contracted rates and then multiplied against notational amounts, and are included within "receivables - others" in the balance sheet with the corresponding gain or loss being recognized within "foreign currency translation and transaction gains (losses)" in the condensed consolidated statement of operations and comprehensive income (loss).

[2] Amounts relating to derivatives which represent currency forward contracts which are valued primarily based on observable inputs, including forward and spot prices for currencies which are netted against contracted rates and then multiplied against notational amounts, and are included within "accounts payable and accrued expenses" in the balance sheet with the corresponding gain or loss being recognized within "foreign currency translation and transaction gains (losses)" in the condensed consolidated statement of operations and comprehensive income (loss).