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LONG-TERM DEBT AND FINANCING ARRANGEMENTS (Summary) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Long-term debt obligations |  |
Long-term debt | $ 212,509 | $ 127,730
Less current portion | 44,910 | 25,256
Long-term debt, less current portion | $ 167,599 | 102,474
Weighted-average interest rate (as a percent) | 2.10% |
Payments under long-term debt obligations |  |
2016 | $ 48,512 |
2017 | 43,698 |
2018 | 59,130 |
2019 | 2,732 |
2020 | 70,025 |
Total payments | 224,097 |
Less amounts representing interest | 11,588 |
Long-term debt | 212,509 | 127,730
Credit Facility |  |
Long-term debt obligations |  |
Long-term debt | $ 70,000 |
Interest rate (as a percent) | 1.70% |
Payments under long-term debt obligations |  |
2016 | $ 1,375 |
2017 | 1,802 |
2018 | 2,101 |
2019 | 2,259 |
2020 | 70,006 |
Total payments | 77,543 |
Less amounts representing interest | 7,543 |
Long-term debt | 70,000 |
Term Loan |  |
Long-term debt obligations |  |
Long-term debt |  | 70,000
Payments under long-term debt obligations |  |
Long-term debt |  | 70,000
Accounts receivable securitization program |  |
Long-term debt obligations |  |
Long-term debt | $ 35,000 |
Interest rate (as a percent) | 1.10% |
Payments under long-term debt obligations |  |
2016 | $ 536 |
2017 | 750 |
2018 | 35,002 |
Total payments | 36,288 |
Less amounts representing interest | 1,288 |
Long-term debt | 35,000 |
Notes payable |  |
Long-term debt obligations |  |
Long-term debt | $ 106,703 | 56,759
Weighted-average interest rate (as a percent) | 1.90% |
Payments under long-term debt obligations |  |
Long-term debt | $ 106,703 | 56,759
Notes payable | Revenue equipment |  |
Long-term debt obligations |  |
Long-term debt | 106,703 |
Payments under long-term debt obligations |  |
2016 | 46,388 |
2017 | 40,927 |
2018 | 21,801 |
2019 | 241 |
Total payments | 109,357 |
Less amounts representing interest | 2,654 |
Long-term debt | 106,703 |
Capital lease obligations |  |
Long-term debt obligations |  |
Long-term debt | $ 806 | 971
Weighted-average interest rate (as a percent) | 5.80% |
Payments under long-term debt obligations |  |
Long-term debt | $ 806 | $ 971
Capital lease obligations | Land and structures (terminals) |  |
Long-term debt obligations |  |
Long-term debt | 806 |
Payments under long-term debt obligations |  |
2016 | 213 |
2017 | 219 |
2018 | 226 |
2019 | 232 |
2020 | 19 |
Total payments | 909 |
Less amounts representing interest | 103 |
Long-term debt | $ 806 |

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