Equity - Common Stock (Detail) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Jun. 13, 2019	Mar. 31, 2020
Class of Stock [Line Items]
Issuance of common stock (in shares)		2,206,957
Common stock share price (in dollars per share)		$ 36.62
Gross proceeds from the issuance of common stock		$ 80.8
Net proceeds from issuance of common stock		79.6
At The Market Equity Offering Program, $550 Million
Class of Stock [Line Items]
Maximum aggregate offering amount	$ 550.0
Shares available under ATM (in shares)		$ 269.9