Recent Transactions - Equity Transactions - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
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Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Summary Of Investments Other Than Investments In Related Parties [Abstract] | |||
| Business combination acquisition related costs | $ 0.1 | $ 0.2 | $ 0.1 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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