STOCK-BASED COMPENSATION (Summary of Nonemployee Director Stock Award Activity) (Details) - Non-employee Directors' Stock-Based Compensation Plans - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share-based Goods and Nonemployee Services Transaction [Line Items]
Non-employee director compensation, cash	$ 81,875	$ 81,875
Weighted - average Grant Date Share Price	$ 31.26	$ 27.47
Directors' Fees Expense	$ 163,750	$ 163,750
Common Shares
Share-based Goods and Nonemployee Services Transaction [Line Items]
Granted	560
Deferred Shares
Share-based Goods and Nonemployee Services Transaction [Line Items]
Granted	2,060	2,981