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, 2012
Dec. 31, 2011
Dec. 31, 2010
Allowance for doubtful accounts
     
Changes in valuation and qualifying accounts      
Balance at beginning of period $ 4,225 $ 10,026 $ 16,453
Charged to costs and expenses, net of recoveries 1,556 (2,052) (2,762)
Charged to other accounts 45 (8) 115
Deductions (1,293) (3,741) (3,780)
Balance at end of period $ 4,533 $ 4,225 $ 10,026