Annual report pursuant to Section 13 and 15(d)

SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS (Details)

v2.4.0.6
SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS (Details) (Allowance for doubtful accounts, USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Allowance for doubtful accounts
     
VALUATION AND QUALIFYING ACCOUNTS      
Balance at the beginning of Period $ 9,394 $ 8,672 $ 7,539
Charged to Costs and Expenses 8,879 8,641 9,638
Net (Deductions) Recoveries (8,535) (7,919) (8,505)
Balance at the end of Period $ 9,738 $ 9,394 $ 8,672