| Leases - Summary of Annual Scheduled Lease Payments (Parenthetical) (Detail) $ in Millions | 12 Months Ended | 
|---|---|
| Dec. 31, 2019  USD ($) | |
| Leases [Abstract] | |
| Operating lease legally binding minimum payments for leases not yet commenced | $ 1.6 | 
| X | ||||||||||
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- Definition Lessee operating minimum lease payment. No definition available. 
 | 
| X | ||||||||||
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- References No definition available. 
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