DEBT - Amendment And Restated Senior Credit Facility (Details) | Jun. 28, 2019USD ($) | Mar. 29, 2019USD ($) | Sep. 30, 2019USD ($) | Jun. 30, 2019USD ($) | Sep. 30, 2019USD ($) | Dec. 31, 2019USD ($) | Nov. 30, 2019USD ($) | Oct. 31, 2019USD ($) | Aug. 01, 2017USD ($) |
Second Amendment, Amended And Restated Credit Agreement [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Maximum borrowing capacity | | $ 75,000,000 | | | | | | | |
Reduction in revolving commitments | | $ 40,000,000 | | | | | | | |
Payment of debt issuance costs | | | | $ 600,000 | | | | | |
Second Amendment, Amended And Restated Credit Agreement [Member] | Minimum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated asset coverage ratio | | 1.10 | | | | | | | |
Second Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarters Ending December 31, 2018 Through June 30, 2019 [Member] | Maximum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated net leverage ratio | | 4.60 | | | | | | | |
Second Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending September 30, 2019 [Member] | Maximum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated net leverage ratio | | 4.25 | | | | | | | |
Second Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending September 30, 2019 [Member] | Minimum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated fixed charge coverage ratio | | 1.50 | | | | | | | |
Second Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending December 31, 2019 [Member] | Maximum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated net leverage ratio | | 4 | | | | | | | |
Second Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending March 31, 2020 [Member] | Maximum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated net leverage ratio | | 3.75 | | | | | | | |
Second Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending June 30, 2020 [Member] | Maximum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated net leverage ratio | | 3.50 | | | | | | | |
Second Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending September 30, 2020 [Member] | Maximum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated net leverage ratio | | 3.25 | | | | | | | |
Second Amendment, Amended And Restated Credit Agreement [Member] | Each Fiscal Quarter Ending Thereafter [Member] | Maximum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated net leverage ratio | | 3 | | | | | | | |
Third Amendment, Amended And Restated Credit Agreement [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Maximum borrowing capacity | | | $ 65,000,000 | | $ 65,000,000 | | | | |
Payment of debt issuance costs | | | $ 100,000 | | | | | | |
Third Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending September 30, 2019 [Member] | Maximum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated net leverage ratio | | | 4.60 | | 4.60 | | | | |
Third Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending September 30, 2019 [Member] | Minimum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated fixed charge coverage ratio | | | 1.10 | | 1.10 | | | | |
First Amendment, Amended And Restated Credit Agreement [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Maximum borrowing capacity | | | | | | | | | $ 115,000,000 |
Amended And Restated Credit Agreement [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Interest rate increase (decrease) (percent) | | | | | 2.00% | | | | |
Quarterly commitment fee on the average daily unused portion (percent) | | | | | 0.50% | | | | |
Term Loan [Member] | Second Amendment, Amended And Restated Credit Agreement [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Payment for debt prepayment | $ 5,000,000 | $ 7,500,000 | | | | | | | |
Letters of Credit [Member] | Second Amendment, Amended And Restated Credit Agreement [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Maximum borrowing capacity | | $ 35,000,000 | | | | | | | |
Letters of Credit [Member] | Third Amendment, Amended And Restated Credit Agreement [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Maximum borrowing capacity | | | $ 25,000,000 | | $ 25,000,000 | | | | |
Revolving Credit Facility [Member] | Amended And Restated Credit Agreement [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Letters of credit outstanding | | | $ 20,600,000 | | $ 20,600,000 | | | | |
Revolving Credit Facility [Member] | Amended And Restated Credit Agreement [Member] | LIBOR [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Interest margin | | | | | 3.25% | | | | |
Covenant Term 5 [Member] | Second Amendment, Amended And Restated Credit Agreement [Member] | Maximum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated net leverage ratio | | 3.50 | | | | | | | |
Covenant Term 5 [Member] | Second Amendment, Amended And Restated Credit Agreement [Member] | Minimum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated net leverage ratio | | 3 | | | | | | | |
Covenant Term 6 [Member] | Second Amendment, Amended And Restated Credit Agreement [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Increase in consolidated net leverage ratio | | 0.25% | | | | | | | |
Increase in commitment fee percentage | | 0.05% | | | | | | | |
Covenant Term 6 [Member] | Second Amendment, Amended And Restated Credit Agreement [Member] | Maximum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated net leverage ratio | | 4 | | | | | | | |
Covenant Term 6 [Member] | Second Amendment, Amended And Restated Credit Agreement [Member] | Minimum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated net leverage ratio | | 3.50 | | | | | | | |
Covenant Term 7 [Member] | Second Amendment, Amended And Restated Credit Agreement [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Increase in consolidated net leverage ratio | | 0.25% | | | | | | | |
Increase in commitment fee percentage | | 0.05% | | | | | | | |
Covenant Term 7 [Member] | Second Amendment, Amended And Restated Credit Agreement [Member] | Minimum [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Consolidated net leverage ratio | | 4 | | | | | | | |
Forecast [Member] | Third Amendment, Amended And Restated Credit Agreement [Member] | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Maximum borrowing capacity | | | | | | $ 35,000,000 | $ 45,000,000 | $ 55,000,000 | |