STOCK-BASED COMPENSATION (Summary of Nonemployee Director Stock Award Activity) (Details) - Non-employee Directors' Stock-Based Compensation Plans [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-employee director compensation, cash	$ 96,875	$ 81,875
Weighted - average Grant Date Share Price	$ 26.73	$ 31.26
Directors' Fees Expense	$ 193,750	$ 163,750
Common Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	1,777	560
Deferred Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	1,847	2,060