Shareholders' Equity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 13, 2014
Dividends per share (in dollars per share)	$ 0.80	$ 0.80	$ 0.76
Treasury stock, shares acquired (in shares)	440,000		324,889
Treasury Stock, Value, Acquired, Cost Method	$ 17,500,000	$ 32,100,000	$ 15,000,000
Remaining authorized repurchase amount	$ 96,100,000
Share repurchase program 2015
Authorized repurchase amount				$ 500,000,000
Treasury stock, shares acquired (in shares)		1,057,115