|
|
|
December 31, |
|
|
|
|
||||
|
|
|
2016 |
|
2015 |
|
Useful Lives |
|
|||
|
Land, building and other |
|
$ |
15,777,000 |
|
$ |
16,357,000 |
|
|
3 to 40 years |
|
|
Recording equipment |
|
|
199,068,000 |
|
|
212,541,000 |
|
|
5 to 10 years |
|
|
Line clearing equipment |
|
|
1,071,000 |
|
|
1,071,000 |
|
|
5 years |
|
|
Vibrator energy sources |
|
|
79,162,000 |
|
|
80,454,000 |
|
|
5 to 15 years |
|
|
Vehicles |
|
|
29,872,000 |
|
|
35,196,000 |
|
|
1.5 to 10 years |
|
|
|
|
|
324,950,000 |
|
|
345,619,000 |
|
|
|
|
|
Less accumulated depreciation |
|
|
(214,033,000) |
|
|
(198,052,000) |
|
|
|
|
|
Net property and equipment |
|
$ |
110,917,000 |
|
$ |
147,567,000 |
|
|
|
|