Note Employee benefits (Contributions to the benefit plans) (Detail) $ in Thousands |
12 Months Ended |
---|---|
Dec. 31, 2016
USD ($)
| |
Pension Plan | |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |
Expected employer contributions to the benefit plans during the next year | $ 0 |
Benefit Restoration Plans | |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |
Expected employer contributions to the benefit plans during the next year | $ 236 |