| **Financing Arrangements - Narrative (Details)**                        | 1 Months Ended | 12 Months Ended  |              |
|-------------------------------------------------------------------------|----------------|------------------|--------------|
||
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Borrowings on lines of credit                                           |           |             |         |   | $ 241,873,000 | $ 287,276,000 | $ 286,154,000 |   |
| Payments of convertible debt                                            |           |             |         |   | 0 | 0 | 38,567,000 |   |
| Loss on extinguishment of debt                                          |           |             |         |   | 0 | 0 | 1,000,000 |   |
| Proceeds from financing obligation                                      |           |             |         | $ 7,900,000 | 0 | 0 | 8,004,000 |   |
| Interest expense                                                        |           |             |         |   | 8,200,000 | 7,000,000 | 8,800,000 |   |
| Interest costs capitalized                                              |           |             |         |   | 0 | $ 0 | 0 |   |
| 2024                                                                    |           |             |         |   | 17,000,000 |   |   |   |
| 2025                                                                    |           |             |         |   | 9,000,000 |   |   |   |
| 2026                                                                    |           |             |         |   | 3,000,000 |   |   |   |
| 2027                                                                    |           |             |         |   | $ 46,000,000 |   |   |   |
| Revolving credit facility | U.K. Subsidiary                             |           |             |         |   |   |   |   |   |
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Maximum borrowing capacity | £                                     |           | £ 2,000,000 |         |   |   |   |   |   |
| Interest rate, stated percentage                                        |           |             |         |   | 8.70% |   |   |   |
| Quarterly principal payment | £                                    |           | 350,000          |         |   |   |   |   |   |
| Balloon payment | £                                                |           | £ 2,800,000 |         |   |   |   |   |   |
| Revolving credit facility | SONIA | U.K. Subsidiary                     |           |             |         |   |   |   |   |   |
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Basis spread on variable rate                                           |           | 3.25%            |         |   |   |   |   |   |
| Amended ABL Facility | Revolving credit facility                        |           |             |         |   |   |   |   |   |
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Maximum borrowing capacity                                              | $ 175,000,000  |             |         |   | $ 109,200,000 |   |   |   |
| Maximum borrowing capacity, option to increase                          | $ 250,000,000  |             |         |   |   |   |   |   |
| Debt instrument, term                                                   | 5 years        |             |         |   |   |   |   |   |
| Borrowings on lines of credit                                           |           |             |         |   | 45,000,000 |   |   |   |
| Letters of credit outstanding, amount                                   |           |             |         |   | 4,000,000 |   |   |   |
| Remaining borrowing capacity                                            |           |             |         |   | $ 60,200,000 |   |   |   |
| Unused capacity, commitment fee percentage                              | 0.375%         |             |         |   | 0.375% |   |   |   |
| Threshold for commitment fee                                            | 50.00%         |             |         |   |   |   |   |   |
| Average daily unused portion, commitment fee                            | 0.25%          |             |         |   |   |   |   |   |
| Weighted average interest rate                                          |           |             |         |   | 6.90% |   |   |   |
| Fixed charge coverage ratio                                             | 1.00           |             |         |   |   |   |   |   |
| Line of credit facility, covenant, minimum, fixed charge leverage ratio | 4.00           |             |         |   |   |   |   |   |
| Amended ABL Facility | Revolving credit facility | Fed Funds Rate       |           |             |         |   |   |   |   |   |
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Basis spread on variable rate                                           | 0.50%          |             |         |   |   |   |   |   |
| Amended ABL Facility | Revolving credit facility | B S B Y              |           |             |         |   |   |   |   |   |
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Basis spread on variable rate                                           | 1.00%          |             |         |   | 1.50% |   |   |   |
| Amended ABL Facility | Revolving credit facility | B S B Y | Minimum    |           |             |         |   |   |   |   |   |
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Basis spread on variable rate                                           | 1.50%          |             |         |   |   |   |   |   |
| Amended ABL Facility | Revolving credit facility | B S B Y | Maximum    |           |             |         |   |   |   |   |   |
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Basis spread on variable rate                                           | 2.00%          |             |         |   |   |   |   |   |
| Amended ABL Facility | Revolving credit facility | Base Rate            |           |             |         |   |   |   |   |   |
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Basis spread on variable rate                                           |           |             |         |   | 0.50% |   |   |   |
| Amended ABL Facility | Revolving credit facility | Base Rate | Minimum  |           |             |         |   |   |   |   |   |
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Basis spread on variable rate                                           | 0.50%          |             |         |   |   |   |   |   |
| Amended ABL Facility | Revolving credit facility | Base Rate | Maximum  |           |             |         |   |   |   |   |   |
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Basis spread on variable rate                                           | 1.00%          |             |         |   |   |   |   |   |
| Convertible Notes due 2021                                              |           |             |         |   |   |   |   |   |
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Payments of convertible debt                                            |           |             | $ 38,600,000 |   |   |   |   |   |
| Face amount repurchased                                                 |           |             | 28,300,000   |   |   |   | 28,300,000 |   |
| Cost of repurchase                                                      |           |             | $ 28,100,000 |   |   |   | 28,100,000 |   |
| Loss on extinguishment of debt                                          |           |             |         |   |   |   | $ 1,000,000 |   |
| Convertible Notes due 2021 | Senior notes                               |           |             |         |   |   |   |   |   |
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Debt instrument, face amount                                            |           |             |         |   |   |   |   | $ 100,000,000 |
| Interest rate, stated percentage                                        |           |             |         |   |   |   |   | 4.00% |
| U.K. term loan | Secured Debt | U.K. Subsidiary                         |           |             |         |   |   |   |   |   |
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Debt instrument, face amount | £                                   |           | £ 7,000,000 |         |   |   |   |   |   |
| Financing Obligation                                                    |           |             |         |   |   |   |   |   |
| **Debt Instrument [Line Items]**                                        |           |             |         |   |   |   |   |   |
| Weighted average interest rate                                          |           |             |         | 5.40% |   |   |   |   |

| X                                                                                                                                                                                                                                                                                                             |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
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| X                                                                                                                                                                                                                                                                                                                     |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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Line of Credit Facility, Maximum Borrowing Capacity, Increased Maximum
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| X                                                                                                                                                                                                                                                                   |
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| X                                                                                                                                                                                                                                                    |
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| - Definition
Proceeds From Financing Obligation
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| X                                                                                                                                                                                                                                                                                                                                       |
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| - Definition
Percentage points added to the reference rate to compute the variable rate on the debt instrument.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Face (par) amount of debt instrument at time of issuance.
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| - Definition
Contractual interest rate for funds borrowed, under the debt agreement.
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| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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Amount of the required periodic payments applied to principal.
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Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.
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Fair value amount of debt instrument that was repurchased.
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Face (par) amount of the original debt instrument that was repurchased.
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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
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Weighted average interest rate of debt outstanding.
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| - Definition
Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.
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| - Definition
Amount of interest capitalized during the period.
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| - Definition
Amount of the cost of borrowed funds accounted for as interest expense.
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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.
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| - Definition
Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.
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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).
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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.
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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.
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The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.
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