Annual report pursuant to Section 13 and 15(d)

Schedule II - Valuation And Qualifying Accounts (Details)

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Schedule II - Valuation And Qualifying Accounts (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract]      
Balance at Beginning of Period $ 5,564 $ 6,310 $ 7,282
Charged to Costs and Expenses 1,511 1,741 1,074
Deductions 2,622 2,487 2,046
Balance at End of Period $ 4,453 $ 5,564 $ 6,310