CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred income taxes	$ (6,241)	$ 1,749	$ 690
Stock appreciation rights exercised (in shares)	28,789	6,236	11,246
Vesting of restricted stock units (in shares)	193,260	138,225	196,102
Vesting of performance shares (in shares)	69,127	265,151	529,213
Treasury shares repurchased (in shares)			1,766,826
Treasury Stock
Treasury shares repurchased (in shares)			1,766,826