Equity - Treasury Stock (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares repurchased (in shares)	148,972		507,600
Shares repurchased, value	$ 900		$ 7,600
Adjustments related to tax withholding for share-based compensation	$ 2,334	$ 1,474	$ 4,914
Treasury Stock
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares repurchased (in shares)			507,600
Shares repurchased for tax withholding on vesting of restricted stock units (in shares)	435,492	429,918	614,123
Adjustments related to tax withholding for share-based compensation	$ 2,334	$ 1,474	$ 4,914