Common Stock Repurchases (Details) - USD ($) shares in Thousands	3 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Jan. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Common stock repurchased and retired	$ 20,000,000	$ 25,000,000
Remaining authorized repurchase amount	$ 230,000,000.0
Minimum
Class of Stock [Line Items]
Authorized amount for share repurchase programs				$ 75,000,000.0
Maximum
Class of Stock [Line Items]
Authorized amount for share repurchase programs			$ 250,000,000.0
Common Stock
Class of Stock [Line Items]
Common stock repurchased and retired (in shares)	426	688
Common stock repurchased and retired	$ 4,000	$ 5,000