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LONG-TERM DEBT - Revolving Credit Agreement Narrative (Details) |  | 12 Months Ended
--- | --- | ---
Dec. 21, 2018 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Debt Instrument [Line Items] |  |  |  |
Loss on debt extinguishment |  | $ 280,000 | $ 799,000 | $ 1,895,000
Liquidity position to meet future obligations, amount |  | 299,500,000 | $ 361,200,000 |
Revolving Credit Agreement |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity | $ 175,000,000 |  |  |
Line of credit facility accordion feature increase limit | $ 275,000,000 |  |  |
Line of credit facility, unused capacity, commitment fee percentage | 0.20% |  |  |
Fixed charge coverage ratio minimum | 1 |  |  |
Line of credit facility, excess availability, commitment percentage | 10.00% |  |  |
Loss on debt extinguishment |  | $ 100,000 |  |
Revolving Credit Agreement | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility, excess availability applied to principal, commitment percentage | 15.00% |  |  |
Revolving Credit Agreement | London Interbank Offered Rate (LIBOR) | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate | 1.25% |  |  |
Revolving Credit Agreement | London Interbank Offered Rate (LIBOR) | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate | 1.75% |  |  |
Revolving Credit Agreement | Base Rate | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate | 0.25% |  |  |
Revolving Credit Agreement | Base Rate | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate | 0.75% |  |  |
Letter of Credit |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity | $ 15,000,000 |  |  |
Bridge Loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity | $ 17,500,000 |  |  |

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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=114001942&loc=d3e12355-112629 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114001942&loc=d3e12317-112629 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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