Capital Stock (Details 2) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Common Stock
Common Stock, Shares, Issued	115,430,042	114,720,347	113,473,951
Treasury Stock, Shares, Beginning Balance	36,505,672	36,205,589	33,928,928
Common Stock, Shares, Outstanding, Beginning Balance	78,924,370	78,514,758	79,545,023
Vested Restricted Stock Units (in shares)	305,535	229,413	321,965
Stock Issued During Period, Shares, Other	124,077	471,412	908,566
Stock issued during period, stock appreciation rights (in shares)	46,739	8,870	15,865
Treasury shares purchased			1,766,826
Shares outstanding at the end of the period	115,906,393	115,430,042	114,720,347
Treasury Stock, Shares	36,690,847	36,505,672	36,205,589
Common Stock, Shares, Outstanding	79,215,546	78,924,370	78,514,758
Treasury Stock
Common Stock
Vested Restricted Stock Units (in shares)	112,275	91,188	125,863
Stock Issued During Period, Shares, Other	54,950	206,261	379,353
Stock issued during period, stock appreciation rights (in shares)	17,950	2,634	4,619
Treasury shares purchased			1,766,826
Outstanding Shares
Common Stock
Vested Restricted Stock Units (in shares)	193,260	138,225	196,102
Stock Issued During Period, Shares, Other	69,127	265,151	529,213
Stock issued during period, stock appreciation rights (in shares)	28,789	6,236	11,246
Treasury shares purchased			1,766,826