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Debt (Schedule of Debt) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2016 | Dec. 31, 2015 | Oct. 04, 2010
Debt Instrument [Line Items] |  |  |  |
Revolving credit facility | $ 100,000 | $ 100,000 | $ 100,000 |
Debt: |  |  |  |
Total debt | 20,796 | 20,796 | 18,363 |
Less: current portion | (13,882) | (13,882) | (13,905) |
Total long-term debt, net | 6,914 | 6,914 | 4,458 |
Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Revolving credit facility | $ 100,000 | $ 100,000 | 100,000 |
Debt: |  |  |  |
Debt interest rate | 1.94% | 1.94% |  |
Debt, maturity |  | September 2019 |  |
Senior Notes [Member] |  |  |  |
Debt: |  |  |  |
Debt interest rate |  |  |  | 9.50%
PST Short-Term Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Short-term debt | $ 10,673 | $ 10,673 | 11,556 |
Debt: |  |  |  |
Debt maturity period range start | 2016 |  |  |
Debt maturity period range end | 2017 |  |  |
PST Short-Term Notes [Member] | Maximum [Member] |  |  |  |
Debt: |  |  |  |
Interest rate maximum | 20.28% |  |  |
PST Short-Term Notes [Member] | Minimum [Member] |  |  |  |
Debt: |  |  |  |
Interest rate minimum | 4.27% |  |  |
PST Long-Term Notes [Member] |  |  |  |
Debt: |  |  |  |
Total long-term debt, net | $ 9,851 | 9,851 | 6,428 |
Debt maturity period range start | 2017 |  |  |
Debt maturity period range end | 2021 |  |  |
PST Long-Term Notes [Member] | Maximum [Member] |  |  |  |
Debt: |  |  |  |
Interest rate maximum | 17.64% |  |  |
PST Long-Term Notes [Member] | Minimum [Member] |  |  |  |
Debt: |  |  |  |
Interest rate minimum | 6.20% |  |  |
Other [Member] |  |  |  |
Debt: |  |  |  |
Total debt | $ 272 | $ 272 | $ 379 |

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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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