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v3.20.2

Long-Term Debt - Bank Credit Facility (Details) - USD ($) |  | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 19, 2017 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 17, 2017
Debt Instrument [Line Items] |  |  |  |  |  |
Total carrying value of debt |  | $ 589,583,000 |  | $ 233,750,000 | $ 258,750,000 |
Interest expense |  | 4,821,000 | $ 7,477,000 | 9,731,000 | 9,607,000 |
Amortization of deferred debt issuance costs |  | 430,000 | 415,000 | 553,000 | 552,000 |
Other interest expense |  | 40,000 | 157,000 | $ 207,000 | $ 255,000 |
Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Weighted average interest rate |  |  |  | 3.47% | 3.28% |
Accrued interest and fees |  |  |  | $ 0 | $ 31,000 |
Line of Credit | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | 34,850,000 |  | $ 265,704,000 | 240,619,000 |
Revolving Credit Facility | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Percentage of stock owned from foreign subsidiaries |  |  |  | 65.00% |  |
Interest expense |  |  |  | $ 8,971,000 | 8,800,000 |
Revolving Credit Facility | Term Loan |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Amortization of deferred debt issuance costs |  | $ 430,000 | $ 415,000 | 553,000 | 552,000 |
Revolving Credit Facility | Line of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Accordion feature, increase limit | $ 100,000,000 |  |  |  |  |
Total carrying value of debt |  |  |  | 233,750,000 | 258,750,000 |
Revolving Credit Facility | Line of Credit | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | 500,000,000 |  |  |  |  | $ 500,000,000
Letter of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Accordion feature, increase limit | 100,000,000 |  |  |  |  |
Letter of Credit | Line of Credit | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | 50,000,000 |  |  |  |  |
Other incremental borrowings | 50,000,000 |  |  |  |  |
Bridge Loan |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Multi-currency swing-line sub-facility borrowings | 50,000,000 |  |  |  |  |
Bridge Loan | Line of Credit | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | $ 50,000,000 |  |  |  |  |
Letters of Credit And Surety Bonds | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Total carrying value of debt |  |  |  | $ 546,000 | $ 631,000 |
Revolving Credit Facility - Euro Currency | London Interbank Offered Rate (LIBOR) | Maximum | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Spread variable rate | 2.25% |  |  | 225.00% |  |
Revolving Credit Facility - Euro Currency | London Interbank Offered Rate (LIBOR) | Minimum | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Spread variable rate | 1.00% |  |  | 100.00% |  |
Revolving Credit Facility - Non-Euro Currency | Maximum | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commitment fee for the unused credit facility (in percentage) | 0.30% |  |  | 30.00% |  |
Revolving Credit Facility - Non-Euro Currency | Minimum | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commitment fee for the unused credit facility (in percentage) | 0.15% |  |  | 15.00% |  |
Revolving Credit Facility - Non-Euro Currency | London Interbank Offered Rate (LIBOR) | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Spread variable rate | 1.00% |  |  | 100.00% |  |
Revolving Credit Facility - Non-Euro Currency | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Spread variable rate |  |  |  | 50.00% |  |
Revolving Credit Facility - Non-Euro Currency | Base Rate | Maximum | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Spread variable rate | 1.25% |  |  | 125.00% |  |
Revolving Credit Facility - Non-Euro Currency | Base Rate | Minimum | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Spread variable rate | 0.00% |  |  | 0.00% |  |

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