XML 56 R31.htm IDEA: XBRL DOCUMENT v2.4.0.8
Nature Of Operations And Critical Accounting Policies And Estimates (Tables)
12 Months Ended
Dec. 31, 2013
Nature Of Operations And Critical Accounting Policies And Estimates [Abstract]  
Schedule Of Allowance For Uncollectible Accounts
    2013     2012     2011  
 
Balance at the beginning of the year $ 638   $ 759     350  
Additions (reductions) charges to expense   (125 )   672     534  
Recoveries of previous write offs   97     24     44  
Current period write offs   (232 )   (817 )   (169 )
Balance at the end of the year $ 378   $ 638   $ 759