Capital Stock - Treasury Shares (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Beginning Balance	$ 22,057	$ 21,785
Ending Balance	$ 25,497	$ 22,057
Treasury Stock
Class of Stock [Line Items]
Beginning Balance (in shares)	113	105
Beginning Balance	$ (181)	$ (165)
Purchases to cover stock compensation taxes (in shares)		8
Purchases to cover stock compensation taxes		$ (16)
Ending Balance	$ (181)	$ (181)
Ending Balance (in shares)	113	113