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Employee Benefit Plans (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Summary of employee benefits charged to operating expenses        
Payroll taxes $ 270 $ 275 $ 599 $ 568
Medical plans 463 484 971 1,002
401k match and profit sharing 223 176 495 329
Pension plan 348 236 696 472
Other 24 28 43 39
Total employee benefits $ 1,328 $ 1,199 $ 2,804 $ 2,410