Employee Benefits - Additional Information (Detail) - USD ($)
$ in Thousands |
12 Months Ended |
|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Jan. 15, 2015 |
| Employee Severance Indemnity/TFR |
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
| Defined benefit obligation |
$ 1,377
|
$ 1,487
|
$ 1,552
|
$ 1,552
|
| Employee severance indemnity provision |
$ 668
|
698
|
|
|
| Annual accrual of total pay |
7.00%
|
|
|
|
| Pre-established annual fixed portion rate of return |
1.50%
|
|
|
|
| Percentage of consumer price index |
75.00%
|
|
|
|
| SERP |
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
| Defined benefit obligation |
$ 837
|
871
|
|
|
| Expected future benefit payments in 2017 |
64
|
|
|
|
| Expected future benefit payments in 2018 |
64
|
|
|
|
| Expected future benefit payments in 2019 |
64
|
|
|
|
| Expected future benefit payments in 2020 |
64
|
|
|
|
| Expected future benefit payments in 2021 |
64
|
|
|
|
| SERP | Accrued Other |
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
| Defined benefit obligation |
64
|
64
|
|
|
| SERP | Other Long-Term Liabilities |
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
| Defined benefit obligation |
$ 773
|
807
|
|
|
| 401(k) Plan |
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
| Minimum age requirement for participate defined contribution plan |
21 years
|
|
|
|
| Matching contributions percentage |
3.00%
|
|
|
|
| Amount paid in matching contributions by the company |
$ 375
|
$ 386
|
$ 309
|
|