Employee Benefits - Schedule of Employee Severance Indemnity (Detail) - Employee Severance Indemnity/TFR $ in Thousands |
12 Months Ended |
|---|---|
|
Dec. 31, 2015
USD ($)
| |
| Defined Benefit Plan Disclosure [Line Items] | |
| Beginning Balance | $ 1,552 |
| Increases | 698 |
| Decreases | 763 |
| Ending Balance | $ 1,487 |