Equity - Narrative (Detail) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	1 Months Ended	9 Months Ended
	May 31, 2020	Sep. 30, 2020	Sep. 30, 2019
Equity [Abstract]
Number of shares issued in public offering (in shares)	10.5
Shares issued, price per share (in dollars per share)	$ 55.00
Proceeds from public offering of common stock, net of issuance costs	$ 541,500	$ 541,536	$ 0