Shareholders' Equity - Additional Information (Detail) - $ / shares shares in Thousands		3 Months Ended
	May 05, 2020	Mar. 31, 2020	Mar. 31, 2019
Subsequent Event
Class of Stock [Line Items]
Date of declaration of dividends	May 05, 2020
Dividend declared per share	$ 0.52
Date of dividend payment	Jun. 15, 2020
Dividends payable to shareholders date of record	Jun. 01, 2020
Discretionary Plan
Class of Stock [Line Items]
Expected common stock shares issued and outstanding		160,000
Shares repurchased		4,000	500
Average price per share		$ 70.81	$ 75.64
Non-Discretionary Plan
Class of Stock [Line Items]
Shares repurchased			88
Average price per share			$ 74.03