WEIGHTED AVERAGE SHARES OUTSTANDING (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Average common shares outstanding (in shares)	69,440,000	69,231,000	69,445,000	69,243,000
Common share equivalents:
Stock options (in shares)	49,000	5,000	65,000	22,000
Nonvested restricted share grants (in shares)	142,000	85,000	143,000	122,000
Performance share units (in shares)	125,000	25,000	119,000	16,000
Average common shares outstanding, assuming dilution (in shares)	69,756,000	69,346,000	69,772,000	69,403,000
Potential common shares with strike prices that would cause them to be anti-dilutive (in shares)	0	252,765	0	253,765