Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands |
Mar. 31, 2019 |
Jan. 01, 2019 |
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| Summary Of Significant Accounting Policies [Abstract] | ||
| Operating lease right of use asset | $ 63,120 | $ 65,000 |
| Operating lease liability | $ 71,311 | $ 74,400 |
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- Definition Summary Of Significant Accounting Policies [Abstract] No definition available.
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of lessee's right to use underlying asset under operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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