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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
Allowances for doubtful accounts      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of Year $ 1,258 $ 877 $ 1,150
Additions Charged to Expense 955 821 313
Additions Charged to Other Accounts 542 0 0
Write Offs (1,162) (440) (586)
Deductions Credited to Other Accounts 0 0 0
Balance at end of Year 1,593 1,258 877
Deferred tax valuation allowance      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of Year 3,295 12,393 14,576
Additions Charged to Expense 0 95 1,917
Additions Charged to Other Accounts 402 2,589 0
Write Offs (860) (11,782) (4,100)
Deductions Credited to Other Accounts 0 0 0
Balance at end of Year $ 2,837 $ 3,295 $ 12,393