XML 37 R28.htm IDEA: XBRL DOCUMENT v2.3.0.15
Derivative Financial Instrument (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended9 Months Ended12 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Dec. 31, 2010
Derivative Instruments, Gain (Loss) [Line Items]     
Income tax benefit$ 21,141$ 19,606$ 48,167$ 43,917 
Interest Rate Swap [Member]
     
Derivative Instruments, Gain (Loss) [Line Items]     
Number of interest rate swap agreements held1 1 1
Notional value of interest rate swap10,000 10,000 10,000
Interest rate swap maturity date  October 2011 October 2011
Interest rate swap fixed rate5.07% 5.07% 5.07%
Negative fair value of derivative financial instrument included in accrued expenses and other current liabilities42 42 399
Unrealized loss accumulated in other comprehensive income associated with derivative instruments17 17 238
Reclassification of unrealized losses from accumulated OCL to earnings7776228225 
Income tax benefit4846139138 
Estimated derivative amount to be reclassified from accumulated OCL to earnings in the next four months  20  
Current 30-day LIBOR-based average receive rate0.21% 0.21%  
Derivative [Member]
     
Derivative Instruments, Gain (Loss) [Line Items]     
Deferred tax benefit$ 10 $ 10 $ 146