Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized	145,000,000	145,000,000
Common stock, shares issued	95,371,211	93,107,440
Treasury stock, shares	18,941,926	18,941,926
Common Stock
Common stock, shares issued	95,371,211	93,107,440
Restricted Stock | Common Stock
Unvested stock awards (in shares)	1,747,385	1,843,041