Quarterly report pursuant to Section 13 or 15(d)

Stock Compensation - Summary of Nonvested Shares Related to the 2007 and 2017 Plan (Detail)

v3.19.3
Stock Compensation - Summary of Nonvested Shares Related to the 2007 and 2017 Plan (Detail)
9 Months Ended
Sep. 30, 2019
$ / shares
shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Nonvested, Shares, Beginning of Period | shares 2,968,941
Granted, Shares | shares 1,567,000
Vested, Shares | shares (1,065,283)
Cancelled, Shares | shares (25,250)
Nonvested, Shares, End of Period | shares 3,445,408
Nonvested, Weighted Average Grant-Date Fair Value, Beginning of Period | $ / shares $ 34.79
Granted, Weighted Average Grant-Date Fair Value | $ / shares 28.21
Vested, Weighted Average Grant-Date Fair Value | $ / shares 32.27
Cancelled, Vested, Weighted Average Grant-Date Fair Value | $ / shares 39.69
Nonvested, Weighted Average Grant-Date Fair Value, End of Period | $ / shares $ 32.54