Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plans - 2013 Omnibus Equity Incentive Plan - Award Limitations - Additional Information (Detail)

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Stock-Based Compensation Plans - 2013 Omnibus Equity Incentive Plan - Award Limitations - Additional Information (Detail)
12 Months Ended
Dec. 31, 2019
shares
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]  
Common stock shares available for grant | shares 5,255,735
Equity incentive plan amendment, shareholder approval date 2017-05
Equity incentive plan amendment, board of directors approval date 2017-02