EARNINGS PER SHARE (Tables)

6 Months Ended

Jun. 30, 2020

EARNINGS PER SHARE [Line Items]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended June 30, 2020
	Income		Shares	Per Share Amount
	(Thousands, except per share amounts)
Basic EPS Calculation
Net income available for common stock	$	25,325	53,053	$	0.48
Diluted EPS Calculation
Effect of dilutive securities	—		211
Net income available for common stock and common stock equivalents	$	25,325	53,264	$	0.48

	Three Months Ended June 30, 2019
	Income		Shares	Per Share Amount
	(Thousands, except per share amounts)
Basic EPS Calculation
Net income available for common stock	$	24,470	52,890	$	0.46
Diluted EPS Calculation
Effect of dilutive securities	—		325
Net income available for common stock and common stock equivalents	$	24,470	53,215	$	0.46

	Six Months Ended June 30, 2020
	Income		Shares	Per Share Amount
	(Thousands, except per share amounts)
Basic EPS Calculation
Net income available for common stock	$	117,002	53,030	$	2.21
Diluted EPS Calculation
Effect of dilutive securities	—		236
Net income available for common stock and common stock equivalents	$	117,002	53,266	$	2.20

	Six Months Ended June 30, 2019
	Income		Shares	Per Share Amount
	(Thousands, except per share amounts)
Basic EPS Calculation
Net income available for common stock	$	118,130	52,858	$	2.23
Diluted EPS Calculation
Effect of dilutive securities	—		352
Net income available for common stock and common stock equivalents	$	118,130	53,210	$	2.22