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Stockholders' Equity - Dividends (Details) - USD ($)											3 Months Ended		9 Months Ended
	Nov. 02, 2021	Oct. 26, 2021	Aug. 27, 2021	Aug. 03, 2021	Jul. 21, 2021	Jun. 29, 2021	May 31, 2021	May 03, 2021	Mar. 22, 2021	Feb. 24, 2021	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Jul. 12, 2021	Mar. 31, 2021
Dividends Payable [Line Items]
Dividends to shareholders (in usd per share)				$ 0.375				$ 0.375		$ 0.375
Dividends paid			$ 7,500,000		$ 80,000,000		$ 7,500,000		$ 7,500,000				$ 102,123,000	$ 0
Stock repurchase program, authorized amount																$ 100,000,000
Repurchase of common stock (in shares)													190,783
Treasury stock, acquired, average cost (in dollars per share)													$ 76.30
Treasury stock, value acquired												$ 14,560,000	$ 14,600,000
Warrants outstanding (in shares)											1,615,555		1,615,555
Warrants exercised (in shares)											2,791		6,050
Exercise price of warrants or rights (in usd per share)											$ 94.57		$ 94.57		$ 90.57
Subsequent Event
Dividends Payable [Line Items]
Dividends to shareholders (in usd per share)		$ 0.50
Repurchase of common stock (in shares)	156,519
Treasury stock, acquired, average cost (in dollars per share)	$ 121.22
Treasury stock, value acquired	$ 19,000,000
Special Cash Dividend
Dividends Payable [Line Items]
Dividends to shareholders (in usd per share)						$ 4.00						$ 4.00

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