| Revenue | 12/31/2017 | 12/31/2016 | 12/31/2015 | 12/31/2014 |
| Total Revenue | 239,289,000 | 214,596,000 | 200,060,000 | 189,692,000 |
| Cost of Revenue | 213,395,000 | 178,765,000 | 161,879,000 | 158,764,000 |
| Gross Profit | 25,894,000 | 35,831,000 | 38,181,000 | 30,928,000 |
| Operating Expenses |
| Research Development | - | - | - | - |
| Selling General and Administrative | - | - | - | - |
| Non Recurring | - | - | - | - |
| Others | - | - | - | - |
| Total Operating Expenses | 213,395,000 | 178,765,000 | 161,879,000 | 158,764,000 |
| Operating Income or Loss | 25,894,000 | 35,831,000 | 38,181,000 | 30,928,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -2,056,000 | -2,164,000 | -3,235,000 | -2,823,000 |
| Earnings Before Interest and Taxes | 25,894,000 | 35,831,000 | 38,181,000 | 30,928,000 |
| Interest Expense | -4,994,000 | -3,087,000 | -3,113,000 | -2,797,000 |
| Income Before Tax | 23,838,000 | 33,667,000 | 34,946,000 | 28,105,000 |
| Income Tax Expense | -21,515,000 | 9,240,000 | 10,532,000 | 7,935,000 |
| Minority Interest | 3,658,000 | 3,358,000 | 3,077,000 | 2,857,000 |
| Net Income From Continuing Ops | 45,353,000 | 24,427,000 | 24,414,000 | 20,170,000 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 44,940,000 | 24,074,000 | 24,083,000 | 19,872,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 44,940,000 | 24,074,000 | 24,083,000 | 19,872,000 |