XML 48 R30.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Accrued Liabilities (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Payables and Accruals [Abstract] |
Schedule of Accrued Liabilities [Table Text Block] | ## Other current liabilities consisted of the following at December 31:
(in thousands) |  | 2017 |  | 2016
Payroll and incentive compensation |  | $ | 9,146 |  |  | $ | 16,101 |
Union dues and benefits |  |  | 12,494 |  |  |  | 10,261 |
Profit sharing and thrift plan |  |  | 443 |  |  |  | 2,004 |
Taxes, other than income taxes |  |  | 6,807 |  |  |  | 7,639 |
Other |  |  | 6,148 |  |  |  | 6,377 |
|  | $ | 35,038 |  |  | $ | 42,382 |

X
- References No definition available. + Details
Name: | us-gaap_PayablesAndAccrualsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration