Intangible Assets - Reconciliation of Intangible Assets (Detail) - USD ($) |
3 Months Ended | 9 Months Ended | |||
---|---|---|---|---|---|
Sep. 30, 2022 |
Sep. 30, 2021 |
Sep. 30, 2022 |
Sep. 30, 2021 |
Dec. 31, 2021 |
|
Goodwill and Intangible Assets Disclosure [Abstract] | |||||
Gross carrying amount at beginning of period | $ 68,322,000 | $ 68,322,000 | |||
Gross carrying amount at end of period | $ 68,322,000 | $ 68,322,000 | 68,322,000 | 68,322,000 | |
Accumulated amortization at beginning of period | (45,573,000) | (43,113,000) | |||
Amortization expense | (615,000) | (615,000) | (1,845,000) | (1,845,000) | |
Accumulated amortization at end of period | (47,418,000) | (44,958,000) | (47,418,000) | (44,958,000) | |
Net book value at end of period | $ 20,904,000 | $ 23,364,000 | $ 20,904,000 | $ 23,364,000 | $ 22,749,000 |