FAIR VALUE OF FINANCIAL INSTRUMENTS - Additional Information (Detail) (USD $) In Thousands			3 Months Ended	6 Months Ended
	Dec. 31, 2010		Mar. 31, 2011 Auction Rate Securities	Jun. 30, 2011 Retained Earnings Accounting Standards Update 2010-11	Jun. 30, 2011 Accumulated Other Comprehensive Income Accounting Standards Update 2010-11
Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]
Auction rate securities par values	$ 4,500	[1]
Consideration for the sale of securities			2,822
Cumulative effect of adopting the other-than-temporary impairment standard and guidance on evaluation of credit derivatives embedded in beneficial interests in securitized financial assets, as of April 1, 2009 and July 1, 2010 (net of related tax of $377)				(693)	693
Cumulative effect of adopting the other-than-temporary impairment standard and guidance on evaluation of credit derivatives embedded in beneficial interests in securitized financial assets, as of April 1, 2009 and July 1, 2010, tax					$ 377

[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