Capital Stock - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 30, 2018
Equity, Class of Treasury Stock [Line Items]
Treasury stock, common (in shares)	16,981,147	16,781,150	16,958,418
Preferred stock, shares authorized (in shares)	1,000,000
Preferred stock, par or stated value per share (in dollars per share)	$ 0.01
Preferred stock, shares outstanding (in shares)	0	0	0
Treasury stock, shares, acquired (in shares)	419,114	153,151	381,041
Treasury shares purchased			$ 19,031,000
Treasury stock issued during period (in shares)	219,117	330,419	1,491,408
Convertible Notes
Equity, Class of Treasury Stock [Line Items]
Face amount repurchased	$ 28,300,000	$ 33,100,000	$ 0
Cost of repurchase	$ 28,100,000	$ 29,100,000
Share repurchase program
Equity, Class of Treasury Stock [Line Items]
Treasury stock, shares, acquired (in shares)	0	0	2,537,833
Treasury shares purchased			$ 19,000,000
Stock repurchase program, authorized amount				$ 100,000,000
Stock repurchase program, remaining authorized repurchase amount	$ 23,800,000
Restricted Stock
Equity, Class of Treasury Stock [Line Items]
Treasury shares purchased	$ 1,400,000	$ 300,000	$ 2,700,000