XML 81 R67.htm IDEA: XBRL DOCUMENT v3.7.0.1
Allowance for Doubtful Accounts, Sales Returns and Discounts (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Balance at beginning of year $ 775 $ 727 $ 15,359
Charges to earnings 620 310 554
Amounts utilized 0 (262) (15,186)
Balance at end of year $ 1,395 $ 775 $ 727