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Long-Term Debt - Credit Agreement (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 28, 2019 | Mar. 31, 2018 | Jun. 30, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Debt Instrument [Line Items] |  |  |  |  |  |
Principal amount |  |  |  | $ 436,146,000 |  |
Repayment of term loan |  |  |  | 35,442,000 | $ 63,807,000 | $ 194,758,000
Loss on extinguishment of long-term debt |  |  |  | (18,000) | (1,183,000) | (397,000)
Amortization of debt issuance costs |  |  |  | 3,600,000 | 3,592,000 | $ 6,154,000
Term Loan Maturing December 2021 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal amount | $ 35,000,000 |  |  | $ 33,250,000 | 0 |
Interest rate (as a percent) |  |  |  | 5.05% |  |
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 | $ 175,000,000 |  |  |  |  |
Additional commitments (up to) | $ 100,000,000 |  |  |  |  |
Available borrowing capacity |  |  |  | $ 171,100,000 |  |
Letters of credit issued |  |  |  | 3,900,000 |  |
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 | $ 25,000,000 |  |  |  |  |
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% |  |  |  |  |
Term Loan Maturing June 2020 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal amount |  |  |  | $ 0 | $ 33,693,000 |
Repayment of term loan |  | $ 61,000,000 |  |  |  |
Loss on extinguishment of long-term debt |  | $ (900,000) |  |  |  |
Former Term Loan |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Loss on extinguishment of long-term debt |  |  | $ (400,000) |  |  |
Revolving Credit Facility Maturing June 2020 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Amortization of debt issuance costs |  |  | $ 1,600,000 |  |  |

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