EARNINGS PER SHARE (Summary Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net income	$ 11,091	$ 24,710
Weighted average common shares outstanding - basic (in shares)	67,931	73,009
Plus: dilutive effect of stock options and unvested restricted stock units (in shares)	1,287	1,866
Weighted average common shares outstanding - diluted (in shares)	69,218	74,875
Basic (in dollars per share)	$ 0.16	$ 0.34
Diluted (in dollars per share)	$ 0.16	$ 0.33