Acquisitions, Goodwill and Other Intangible Assets - Summary of Goodwill and Intangible Assets (Detail) - USD ($) $ in Thousands  | 
Mar. 31, 2021  | 
Dec. 31, 2020  | 
Mar. 31, 2020  | 
Dec. 31, 2019  | 
|---|---|---|---|---|
| Goodwill and Intangible Assets Disclosure [Abstract] | ||||
| Goodwill, gross carrying amount | $ 34,046 | $ 33,375 | ||
| Intangible assets, gross carrying amount | 23,975 | 24,745 | ||
| Goodwill and intangible assets, gross carrying amount, total | 58,021 | 58,120 | ||
| Intangible assets, accumulated amortization | (7,204) | (6,067) | ||
| Goodwill, net book value | 34,046 | 33,375 | $ 19,062 | $ 15,072 | 
| Intangible assets, net book value | 16,771 | 18,678 | ||
| Goodwill and intangible assets, net book value | $ 50,817 | $ 52,053 | 
| X | ||||||||||
- Definition Gross carrying amount of finite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance. No definition available. 
  | 
| X | ||||||||||
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
  | 
| X | ||||||||||
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
  | 
| X | ||||||||||
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
  | 
| X | ||||||||||
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
  | 
| X | ||||||||||
- References No definition available. 
  | 
| X | ||||||||||
- Definition Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
  | 
| X | ||||||||||
- Definition Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance. No definition available. 
  |