XML 42 R31.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Supplemental Cash Flow Information (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2018
Supplemental Cash Flow Elements [Abstract] |
Supplemental Cash Flow Information |
| Nine months ended
| September 30, 2018 |  | September 30, 2017
Supplemental disclosures: | (in thousands)
Interest paid | $ | 5 |  |  | $ | — |
Income taxes paid | $ | 9,183 |  |  | $ | 7,138 |
Non-cash investing and financing activities: |  |  |  |  |
Non-cash capital expenditures | $ | 288 |  |  | $ | 8,059 |

X
- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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