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Debt - Long-Term Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Less – unamortized original issue discount | $ (3,406) |  | $ (5,346)
Less – deferred financing costs |  | $ (3,700) |
Total debt, net of unamortized discounts | 374,719 |  | 351,217
Current portion of long-term debt, net of unamortized discounts | (237,500) |  | (14,063)
Long-term debt, net of unamortized discounts | 137,219 |  | 337,154
2021 Credit Agreement |  |  |
Debt Instrument [Line Items] |  |  |
Less – deferred financing costs | (3,400) |  |
2021 Credit Agreement | 2021 Term Loan |  |  |
Debt Instrument [Line Items] |  |  |
Carrying Value | 148,125 |  |
Less – deferred financing costs | (3,406) |  |
Total debt, net of unamortized discounts | 144,719 | $ 150,000 |
2018 Credit Agreement | 2018 Term Loan |  |  |
Debt Instrument [Line Items] |  |  |
Carrying Value |  |  | 126,563
Less – deferred financing costs |  |  | (1,155)
Total debt, net of unamortized discounts |  |  | 125,408
Senior Convertible Notes 2016 |  |  |
Debt Instrument [Line Items] |  |  |
Carrying Value | 230,000 |  | 230,000
Less – unamortized original issue discount | 0 |  | (3,021)
Less – deferred financing costs | 0 |  | (1,170)
Total debt, net of unamortized discounts | 230,000 |  | $ 225,809
Current portion of long-term debt, net of unamortized discounts | $ (230,000) |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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