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Employee Benefit Plans (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Summary of employee benefits charged to operating expenses        
Payroll taxes $ 251 $ 261 $ 883 $ 860
Medical plans 415 491 1,414 1,462
401k match and profit sharing 201 225 585 720
Pension plan 307 348 920 1,044
Other 56 56 118 99
Total employee benefits $ 1,230 $ 1,381 $ 3,920 $ 4,185