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	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Share-based Goods and Nonemployee Services Transaction [Line Items]
Non-employee director compensation, cash	$ 163,750	$ 163,750
Weighted - average Grant Date Share Price	$ 32.46	$ 27.18
Directors' Fees Expense	$ 327,500	$ 327,500
Common Shares
Share-based Goods and Nonemployee Services Transaction [Line Items]
Granted	1,078
Deferred Shares
Share-based Goods and Nonemployee Services Transaction [Line Items]
Granted	3,966	6,025