Variable Interest Entities - Carrying Value of Variable Interest Entities of Consolidated Financial Statements (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Assets	$ 1,875,636	$ 1,717,190
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Assets	4,822	4,888
Liabilities	0	0
Variable Interest Entity, Primary Beneficiary | PF Melville
Variable Interest Entity [Line Items]
Assets	2,642	2,682
Liabilities	0	0
Variable Interest Entity, Primary Beneficiary | MMR
Variable Interest Entity [Line Items]
Assets	2,180	2,206
Liabilities	$ 0	$ 0