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Identifiable Intangible Assets from Acquisitions - Additional Information (Detail) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Finite Lived Intangible Assets [Line Items] |  |  |
Pre-tax non-cash impairment totaling | $ 4,959,000 | $ 5,000,000.0 | $ 4,959,000
Amortization of intangible assets from acquisitions | 1,181,000 | $ 1,763,000 |
Estimated amortization expense in 2021 | 3,300,000 |  |
Estimated amortization expense in 2022 | 2,100,000 |  |
Estimated amortization expense in 2023 | 2,000,000.0 |  |
Estimated amortization expense in 2024 | 602,000 |  |
Customer Relationships |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Pre-tax non-cash impairment totaling | $ 3,430,000 |  | 3,430,000
Weighted average useful life | 5 years |  |
Technologies |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Pre-tax non-cash impairment totaling | $ 1,062,000 |  | 1,062,000
Weighted average useful life | 3 years |  |
Tradenames |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Pre-tax non-cash impairment totaling | $ 121,000 |  | 121,000
Weighted average useful life | 2 years |  |
Non-compete Agreements |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Pre-tax non-cash impairment totaling | $ 346,000 |  | $ 346,000
Non-compete Agreements | Minimum |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Weighted average useful life | 1 year |  |
Non-compete Agreements | Maximum |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Weighted average useful life | 2 years |  |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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