Share-based compensation arrangement by share-based payment award post-termination exercise period original term.

No definition available.

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- Definition

Share-based compensation arrangement by share-based payment award post-termination exercise period revised term.

+ References

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- Definition

Stock shares issued net of shares for tax withholdings.

+ References

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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=116856206&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=115993241&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=116856206&loc=d3e5070-113901

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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.

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- Definition

Value, before forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

+ References

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Share-based Compensation - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Aug. 05, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares issued under stock purchase plan, stock option exercises and restricted stock awards and units		43,603	50,928	295,496	257,833
Share-based compensation expense		$ 5,844	$ 5,261	$ 17,378	$ 14,392
Transition and Retirement Agreement [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share based compensation, post-termination exercise period original term				18 months
Maximum [Member] \| Transition and Retirement Agreement [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share based compensation, post-termination exercise period revised term				4 years
President and Chief Executive Officer [Member] \| Transition and Retirement Agreement [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense		$ 2,200		$ 5,900
Employment Agreement [Member] \| Global Spine [Member] \| Inducement Grants [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share issued under restricted stock units and stock options, value	$ 1,500