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Long-Term Debt - Credit Agreement (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Debt Instrument [Line Items] |  |  |  |
Principal amount |  | $ 404,732 |  |
Repayment of term loan |  | 3,500 | $ 35,442 | $ 63,807
Gain (loss) on extinguishment of long-term debt |  | 9,239 | (18) | $ (1,183)
Term Loan Maturing December 2021 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal amount |  | $ 29,750 | $ 33,250 |
Interest rate (as a percent) |  | 3.40% |  |
Frequency of periodic payment |  | quarterly |  |
Periodic principal payment (as a percent) |  | 2.50% |  |
Term Loan Maturing December 2021 | Base Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate (as a percent) |  | 2.25% |  |
Term Loan Maturing December 2021 | LIBOR |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate (as a percent) |  | 3.25% |  |
Revolving Credit Facility Maturing December 2021 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Borrowing capacity |  | $ 175,000 |  |
Additional commitments (up to) |  | 100,000 |  |
Available borrowing capacity |  | 160,200 |  |
Letters of credit issued |  | $ 2,800 |  |
Commitment fee percentage |  | 0.50% |  |
Revolving Credit Facility Maturing December 2021 | Base Rate | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate (as a percent) |  | 1.50% |  |
Revolving Credit Facility Maturing December 2021 | Base Rate | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate (as a percent) |  | 2.50% |  |
Revolving Credit Facility Maturing December 2021 | LIBOR | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate (as a percent) |  | 2.50% |  |
Revolving Credit Facility Maturing December 2021 | LIBOR | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate (as a percent) |  | 3.50% |  |
Letter of Credit |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Borrowing capacity |  | $ 25,000 |  |
Credit Agreement |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity date |  | Dec. 31, 2021 |  |
Credit Agreement | Collateral Pledged |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum percent of shares of foreign subsidiaries |  | 66.00% |  |
Former Term Loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Repayment of term loan | $ 61,000 |  |  |
Gain (loss) on extinguishment of long-term debt | $ (900) |  |  |

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- Definition Maximum aggregate commitments with respect to an increase in the Revolving Credit Facility, additional term loans, or a combination thereof that may be requested under the Credit Agreement. + References No definition available. + Details
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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=120520924&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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