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Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan, Accumulated other comprehensive income (loss) , Net	$ (5,200)	$ (1,800)	$ (4,500)
Defined Contribution Plan [Member] | 401(k) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution expense	4,100	3,500	$ 200
Pension Plan [Member] | Partnership in Care Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension liability under defined benefit pension plan	66,468	57,993
Pension Plan [Member] | Partnership in Care Benefits Plan [Member] | Other Liabilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension liability under defined benefit pension plan	$ 4,300	$ 3,500

X

- Definition

Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580

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- Definition

Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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- Definition

Amount of cost for defined contribution plan.

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-SubTopic 70
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