WEIGHTED AVERAGE SHARES OUTSTANDING (Details) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Average common shares outstanding (in shares)	69,392,000	69,248,000
Common share equivalents:
Stock options (in shares)	81,000	93,000
Nonvested restricted share grants (in shares)	172,000	161,000
Performance share units (in shares)	96,000	0
Average common shares outstanding, assuming dilution (in shares)	69,741,000	69,502,000
Potential common shares with strike prices that would cause them to be anti-dilutive (in shares)	0	0