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Employee Benefit Plans (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 31, 2019 | May 31, 2018 | May 31, 2020 | Apr. 30, 2016 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  | $ 25,995 | $ 30,505 | $ 29,137
2006 Long Term Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Expiration date |  |  |  |  | Apr. 13, 2016 |  |
A2016 Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of additional shares reserved for future grant (in shares) | 3,100,000 | 1,700,000 | 2,000,000.0 | 2,500,000 |  |  |
Additional shares available for issuance (in shares) |  |  |  | 699,827 |  |  |
Number of shares remained available for future grant (in shares) |  |  |  |  | 1,800,000 |  |
Employee Stock Purchase Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of additional shares reserved for future grant (in shares) |  |  |  | 1,000,000.0 |  |  |
Number of shares remained available for future grant (in shares) |  |  |  |  | 240,000 |  |
Maximum percentage of compensation contributed by employees (in percentage) |  |  |  |  | 10.00% |  |
Purchase percentage of stock at fair market value (in percentage) |  |  |  |  | 85.00% |  |
Number of shares authorized (in shares) |  |  |  | 2,000,000.0 |  |  |
Stock-based compensation |  |  |  |  | $ 1,700 | 1,500 | 1,400
Shares purchased under ESPP |  |  |  |  | 171,000 |  |
Weighted average price of shares purchased under ESPP (in dollars per share) |  |  |  |  | $ 28.72 |  |
Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock-based compensation cost capitalized in inventory |  |  |  |  | $ 900 | 900 | $ 900
Stock Options |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Weighted average estimated fair value of options granted |  |  |  |  |  |  | $ 9.72
Options, exercises in period, intrinsic value |  |  |  |  | 6,700 | 7,300 | $ 3,500
Options, vested in period, total fair value |  |  |  |  | 2,300 | 3,200 | $ 4,100
Weighted average expected life |  |  |  |  |  |  | 6 years 2 months 12 days
Risk-free interest rate |  |  |  |  |  |  | 1.85%
Expected volatility |  |  |  |  |  |  | 33.90%
Total unrecognized compensation |  |  |  |  | $ 900 |  |
Weighted-average period of recognition of stock based compensation |  |  |  |  | 1 year 4 months 24 days |  |
Stock Options | A2016 Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting term |  |  |  |  | 4 years |  |
Expiration period |  |  |  |  | 10 years |  |
Stock Options | Target Shares Granted | A2016 Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting term |  |  |  |  | 12 months |  |
Stock Options | Remaining Tranche | A2016 Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting term |  |  |  |  | 3 years |  |
Performance Shares |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting term |  |  |  |  | 3 years |  |
Performance Shares | A2016 Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting term |  |  |  |  | 3 years |  |
Performance Shares | Target Shares Granted | Minimum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Percentage vest of performance shares |  |  |  |  | 0.00% |  |
Performance Shares | Target Shares Granted | Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Percentage vest of performance shares |  |  |  |  | 150.00% |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
RSU aggregate intrinsic value, vested |  |  |  |  | $ 24,300 | 16,100 | $ 19,400
RSU fair value, vested |  |  |  |  | 20,400 | $ 20,400 | $ 18,600
Total unrecognized compensation |  |  |  |  | $ 37,000 |  |
Weighted-average period of recognition of stock based compensation |  |  |  |  | 2 years 6 months |  |
Restricted Stock Units (RSUs) | A2016 Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting term |  |  |  |  | 4 years |  |
ESPP |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Weighted average expected life |  |  |  |  | 6 months | 6 months | 6 months
Risk-free interest rate |  |  |  |  | 0.05% | 0.72% | 2.06%
Expected volatility |  |  |  |  | 40.80% | 54.80% | 43.90%
Expected dividend rate |  |  |  |  | 0.00% | 0.00% | 0.00%

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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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. + References No definition available. + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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