Subsequent Events Subsequent Events (Details Textual) - USD ($)		12 Months Ended
	Feb. 15, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Feb. 12, 2020
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount					$ 200,000,000
Dividends declared per share (usd per share)		$ 2.40	$ 1.35	$ 1.00
Subsequent Event [Member]
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount	$ 100,000,000
Dividend Declared [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends declared per share (usd per share)	$ 0.25