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Financial Guarantee Insurance Contracts - Estimated Future Amortization Expense for Insurance Intangible Asset (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Amortization Of Intangible Assets [Line Items] |  |  |  |  |
Amortization of insurance intangible assets | $ 226,242 | $ 23,242 | $ 262,520 | $ 51,878 |
Intangible Assets, Gross (Excluding Goodwill) | 1,265,052 |  | 1,265,052 |  | $ 1,551,576
Finite-Lived Intangible Assets, Accumulated Amortization | 810,222 |  | 810,222 |  | 832,645
2019 | 24,591 |  | 24,591 |  |
2020 | 45,139 |  | 45,139 |  |
2021 | 39,777 |  | 39,777 |  |
2022 | 36,194 |  | 36,194 |  |
2023 | 33,016 |  | 33,016 |  |
Thereafter | 276,113 |  | 276,113 |  |
Insurance intangible asset | $ 454,830 |  | $ 454,830 |  | $ 718,931

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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=118932676&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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