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LONG-TERM DEBT AND FINANCING ARRANGEMENTS (Summary) (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Long-term debt obligations |  |
Long-term debt | $ 249,632 | $ 268,919
Less current portion | 51,562 | 61,930
Long-term debt, less current portion | 198,070 | 206,989
Payments under long-term debt obligations |  |
Due in one year or less | 59,036 |
Due after one year through two years | 80,391 |
Due after two years through three years | 29,575 |
Due after three years through four years | 25,258 |
Due after four years through five years | 77,443 |
Due after five years | 225 |
Total payments | 271,928 |
Less amounts representing interest | 22,296 |
Long-term debt | 249,632 | 268,919
Credit Facility |  |
Long-term debt obligations |  |
Long-term debt | $ 70,000 | 70,000
Interest rate (as a percent) | 3.60% |
Payments under long-term debt obligations |  |
Due in one year or less | $ 2,771 |
Due after one year through two years | 3,069 |
Due after two years through three years | 3,097 |
Due after three years through four years | 3,076 |
Due after four years through five years | 70,050 |
Total payments | 82,063 |
Less amounts representing interest | 12,063 |
Long-term debt | 70,000 | 70,000
Credit Facility | Interest rate swap agreement |  |
Long-term debt obligations |  |
Amount of borrowings covered by the interest rate swap | $ 50,000 |
Effective fixed interest rate on hedged borrowings (as a percent) | 3.35% |
Accounts receivable securitization program |  |
Long-term debt obligations |  |
Long-term debt | $ 45,000 | 45,000
Interest rate (as a percent) | 2.90% |
Payments under long-term debt obligations |  |
Due in one year or less | $ 1,507 |
Due after one year through two years | 46,271 |
Total payments | 47,778 |
Less amounts representing interest | 2,778 |
Long-term debt | 45,000 | 45,000
Notes payable |  |
Long-term debt obligations |  |
Long-term debt | $ 134,258 | 153,441
Weighted-average interest rate (as a percent) | 2.90% |
Payments under long-term debt obligations |  |
Due in one year or less | $ 54,521 |
Due after one year through two years | 30,908 |
Due after two years through three years | 26,471 |
Due after three years through four years | 22,177 |
Due after four years through five years | 7,393 |
Due after five years | 225 |
Total payments | 141,695 |
Less amounts representing interest | 7,437 |
Long-term debt | 134,258 | 153,441
Capital lease obligations |  |
Long-term debt obligations |  |
Long-term debt | $ 374 | 478
Weighted-average interest rate (as a percent) | 5.60% |
Payments under long-term debt obligations |  |
Due in one year or less | $ 237 |
Due after one year through two years | 143 |
Due after two years through three years | 7 |
Due after three years through four years | 5 |
Total payments | 392 |
Less amounts representing interest | 18 |
Long-term debt | $ 374 | $ 478

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