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Employee Benefit Plans (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Summary of employee benefits charged to operating expenses        
Payroll taxes $ 261 $ 272 $ 860 $ 840
Medical plans 491 510 1,462 1,512
401k match and profit sharing 225 159 720 488
Pension plan 348 236 1,044 708
Other 56 42 99 81
Total employee benefits $ 1,381 $ 1,219 $ 4,185 $ 3,629