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Share-based Compensation - Additional Information (Detail) - USD ($) | 1 Months Ended | 12 Months Ended |
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Sep. 30, 2020 | Aug. 31, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2015 | Jun. 29, 2004
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Options outstanding |  |  | 1,397,054 | 1,491,019 |  |  |  |
Options exercisable |  |  | 944,630 |  |  |  |  |
Income tax benefit related to expense |  |  | $ 3,100,000 | $ 3,200,000 | $ 3,500,000 |  |  |
Exercised stock option amount |  |  | 3,300,000 |  |  |  |  |
Realized tax benefit amount |  |  | $ 600,000 |  |  |  |  |
Closing stock price |  |  | $ 31.09 |  |  |  |  |
Non-vested shares, vested in period |  |  |  | 0.0 | 0.0 | $ 2,700,000 |  |
Share-based compensation |  |  | $ 15,432,000 | 16,207,000 | 21,540,000 |  |  |
General and administrative [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Share-based compensation |  |  | 10,289,000 | 10,624,000 | 16,872,000 |  |  |
Transition and Retirement Agreement [Member] | General and administrative [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Share-based compensation |  |  | $ 0 | 0 | $ 6,500,000 |  |  |
Global Spine [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Options outstanding |  |  | 50,711 |  |  |  |  |
Options exercisable |  |  | 25,355 |  |  |  |  |
Share based compensation grants of restricted stock unit |  | 14,743 |  |  |  |  |  |
Global Spine [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Common stock acqure under stock option |  | 50,711 |  |  |  |  |  |
Global Extremities [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Options outstanding |  |  | 32,945 |  |  |  |  |
Options exercisable |  |  | 8,236 |  |  |  |  |
Share based compensation grants of restricted stock unit | 10,624 |  |  |  |  |  |  |
Global Extremities [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Common stock acqure under stock option | 32,945 |  |  |  |  |  |  |
2012 LTIP Plan [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Award Contractual term |  |  | 10 years |  |  |  |  |
Amount of shares reserved for issuance |  |  | 7,050,000 |  |  |  |  |
Options outstanding |  |  | 1,150,898 |  |  |  |  |
Options exercisable |  |  | 748,539 |  |  |  |  |
2004 LTIP [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Amount of shares reserved for issuance |  |  |  |  |  |  |  | 3,100,000
Spinal Kinetics Inducement Plan [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Options outstanding |  |  | 0 |  |  |  |  |
Number of shares reserved for employees |  |  |  |  | 51,705 |  |  |
Stock Purchase Plan [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Amount of shares reserved for issuance |  |  | 2,850,000 |  |  |  |  |
Maximum percentage of compensation eligible employees to be deducted for purchase of common stock |  |  | 25.00% |  |  |  |  |
Purchase price of shares equivalent to fair market value |  |  | 85.00% |  |  |  |  |
Shares issued under stock purchase plan |  |  | 2,172,134 |  |  |  |  |
Stock Purchase Plan [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Percentage of compensation eligible employees to be deducted for purchase of common stock |  |  | 1.00% |  |  |  |  |
Restricted Stock [Member] | 2012 LTIP Plan [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Unvested restricted stock and stock units outstanding |  |  | 13,978 |  |  |  |  |
Restricted Stock [Member] | Spinal Kinetics Inducement Plan [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Unvested restricted stock and stock units outstanding |  |  | 1,284 |  |  |  |  |
Restricted Stock Units [Member] | Global Spine [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Unvested restricted stock and stock units outstanding |  |  | 7,372 |  |  |  |  |
Restricted Stock Units [Member] | Global Extremities [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Unvested restricted stock and stock units outstanding |  |  | 7,968 |  |  |  |  |
Restricted Stock Units [Member] | 2012 LTIP Plan [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Unvested restricted stock and stock units outstanding |  |  | 851,847 |  |  |  |  |
Market-based Restricted Stock Units [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Share based compensation grants of restricted stock unit |  |  | 152,575 |  |  |  |  |
Unamortized compensation expense |  |  | $ 8,300,000 |  |  |  |  |
Weighted-average period for unamortized compensation cost expected to be recognized |  |  | 1 year 8 months 12 days |  |  |  |  |
Aggregate intrinsic value of restricted stock outstanding |  |  | $ 10,000,000.0 |  |  |  |  |
Share-based compensation |  |  | $ 4,414,000 | 3,509,000 | $ 4,733,000 |  |  |
Common stock issued based on performance stock units |  |  | 1 |  |  |  |  |
Percentage of performance to be achieved |  |  | 100.00% |  |  |  |  |
Performance period |  |  | 3 years |  |  |  |  |
Share based compensation, fair market value of restricted stock units vested |  |  | $ 0.0 | 1,400,000 | 0.0 |  |  |
Market-based Restricted Stock Units [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Percentage of performance to be achieved |  |  | 200.00% |  |  |  |  |
Market-based Restricted Stock Units [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Percentage of performance to be achieved |  |  | 50.00% |  |  |  |  |
Staff Share Option Plan [Member] | 2004 LTIP [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Options outstanding |  |  | 12,500 |  |  |  |  |
Stock Option [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Unamortized compensation expense |  |  | $ 2,000,000.0 |  |  |  |  |
Weighted-average period for unamortized compensation cost expected to be recognized |  |  | 1 year 4 months 24 days |  |  |  |  |
Total intrinsic value of options exercised |  |  | $ 600,000 | 900,000 | 1,400,000 |  |  |
Aggregate intrinsic value of options outstanding |  |  | 1,700,000 |  |  |  |  |
Aggregate intrinsic value of options exercisable |  |  | 500,000 |  |  |  |  |
Share-based compensation |  |  | $ 1,893,000 | 2,571,000 | 4,054,000 |  |  |
Service period |  |  | 4 years |  |  |  |  |
Time-based Restricted Stock Awards and Stock Units [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Share based compensation grants of restricted stock unit |  |  | 295,240 |  |  |  |  |
Unamortized compensation expense |  |  | $ 15,200,000 |  |  |  |  |
Weighted-average period for unamortized compensation cost expected to be recognized |  |  | 2 years 7 months 6 days |  |  |  |  |
Vesting period |  |  | 4 years |  |  |  |  |
Non-vested shares, vested in period |  |  | $ 9,000,000.0 | 6,500,000 | 9,500,000 |  |  |
Aggregate intrinsic value of restricted stock outstanding |  |  | 17,400,000 |  |  |  |  |
Share-based compensation |  |  | $ 7,437,000 | $ 8,485,000 | $ 11,084,000 |  |  |
Restricted Stock Unit with Deferred Delivery (DSUs) [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Vesting period |  |  | 1 year |  |  |  |  |
Awards vested but not settled |  |  | 59,001 |  |  |  |  |
Performance-based Restricted Stock Awards and Stock Units [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Share based compensation grants of restricted stock unit |  |  | 0 | 0 | 0 |  |  |
Performance-based Restricted Stock Awards [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Share based compensation grants of restricted stock unit |  |  |  |  |  |  | 110,660 |
Unamortized compensation expense |  |  | $ 0 |  |  |  |  |
Non-vested shares, vested in period |  |  | 0.0 | $ 0.0 | $ 3,200,000 |  |  |
Aggregate intrinsic value of restricted stock outstanding |  |  | 0 |  |  |  |  |
Share-based compensation |  |  | $ 0 | 0 |  |  |  |
Performance-based Restricted Stock Units [Member] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |  |
Share based compensation grants of restricted stock unit |  |  |  |  |  |  | 55,330 |
Unamortized compensation expense |  |  |  | 0 |  |  |  |
Aggregate intrinsic value of restricted stock outstanding |  |  |  | 0 |  |  |  |
Share-based compensation |  |  |  | $ 0 | $ 0 | $ 0 |  |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -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 Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + 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 (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + 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 (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Amount of tax benefit for recognition of expense of award under share-based payment arrangement. + 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 (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Amount of tax benefit from exercise of option under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=SL79508275-113901 + Details
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- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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 (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting 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 (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan. + 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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- Definition Number of shares authorized for issuance under share-based payment arrangement. + 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + 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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