Defined contribution plan employer matching contribution vesting period.

No definition available.

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- Definition

The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(b))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

+ Details

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Period Type:	duration

- 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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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

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- Definition

Maximum amount the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Details

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Defined Contribution Benefit Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Contribution Plan Disclosure [Line Items]
Rabbi trust assets	$ 2,300,000	$ 1,400,000
Savings 401(k) Plan
Defined Contribution Plan Disclosure [Line Items]
Employer-matching contribution	50.00%
Employees contribution percentage basis for employer matching contribution (as a percent)	6.00%
Employees initial service period	3 years
Annual deferral limit	$ 19,000	18,500	$ 18,000
Amount of Employer contributions during period	$ 1,900,000	$ 1,800,000	$ 1,700,000
Savings 401(k) Plan \| Share-based Compensation Award, Tranche One
Defined Contribution Plan Disclosure [Line Items]
Employer-matching contribution	100.00%
Non-Qualified Deferred Compensation Plan
Defined Contribution Plan Disclosure [Line Items]
Employer-matching contribution	50.00%
Employees contribution percentage basis for employer matching contribution (as a percent)	6.00%
Employees initial service period	3 years