Fair Value Information for Financial Assets and Liabilities , as well as Cost or Amortized Cost (Parenthetical) (Detail) (USD $)	Sep. 30, 2011		Dec. 31, 2010
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Auction rate securities par values			$ 4,500,000	[1]
Derivatives	12,227,000	[2]
Auction rate securities			3,027,000	[1]
Interest Income (Expense), Net | Interest rate lock transactions | Accounts Payable and Accrued Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivatives	11,052,000
Interest Income (Expense), Net | Treasury Rate Lock | Accounts Payable and Accrued Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
U.S. Treasury interest rates maturity	10 years
Foreign Currency Gain (Loss) | Foreign Exchange Contract | Accounts Payable and Accrued Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivatives	1,175,000
Long-term marketable securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Auction rate securities			1,287,000
Long-term restricted cash, cash equivalents and marketable securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Auction rate securities			$ 1,740,000

[1] Included in the consolidated balance sheets as follows: December 31, 2010 (Dollars in thousands) Long-term marketable securities $ 1,287 Long-term restricted cash, cash equivalents and marketable securities 1,740 $ 3,027

[2] Including: (i) $11,052,000 relating to derivatives which represent interest rate lock transactions which are valued primarily based on observable inputs, including 10-year U.S. Treasury interest rates, and are included within "accounts payable and accrued expenses" in the balance sheet with the corresponding gain or loss being recognized within "interest expense, net" in the condensed consolidated statement of operations and comprehensive income (loss); and (ii) $1,175,000 relating to derivatives which represent currency forward contracts which are valued primarily based on observable inputs , including forward and spot prices for currencies, 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).