XML 110 R78.htm IDEA: XBRL DOCUMENT v3.3.1.900
Accounts Receivable - Balance and Activity in Allowance for Doubtful Accounts (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Allowance for Doubtful Accounts      
Beginning balance $ 7,083 $ 11,061 $ 5,635
Additions charged to costs and expenses 1,320 818 5,497
Deductions (3,556) (4,796) (71)
Ending balance $ 4,847 $ 7,083 $ 11,061