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Debt (Schedule of Debt) (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2018 | Dec. 31, 2017
Debt Instrument [Line Items] |  |
Revolving credit facility | $ 101,000 | $ 121,000
Debt: |  |
Total debt | 3,026 | 8,044
Less: current portion | (1,808) | (4,192)
Total long-term debt, net | 1,218 | 3,852
Revolving Credit Facility [Member] |  |
Debt Instrument [Line Items] |  |
Revolving credit facility | $ 101,000 | 121,000
Debt: |  |
Debt, maturity | September 2021 |
Maximum [Member] | Revolving Credit Facility [Member] |  |
Debt: |  |
Interest rate | 3.30% |
Minimum [Member] | Revolving Credit Facility [Member] |  |
Debt: |  |
Interest rate | 3.16% |
PST Short-Term Notes [Member] |  |
Debt Instrument [Line Items] |  |
Short-term debt | $ 675 |
Debt: |  |
Debt, maturity | March 2019 |
Interest rate | 11.26% |
PST Long-Term Notes [Member] |  |
Debt: |  |
Total long-term debt, net | $ 2,351 | 8,016
Debt maturity period range start | 2019 |
Debt maturity period range end | 2021 |
PST Long-Term Notes [Member] | Maximum [Member] |  |
Debt: |  |
Interest rate | 10.00% |
PST Long-Term Notes [Member] | Minimum [Member] |  |
Debt: |  |
Interest rate | 8.00% |
Other [Member] |  |
Debt: |  |
Total debt | $ 0 | $ 28

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- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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