SHARE BASED COMPENSATION (Summary of Share Option Activity) (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Number of Common Shares
Beginning balance	87,300
Granted	16,212
Exercised	(19,918)	(28,736)
Forfeited	(920)
Expired	(196)
Ending balance	82,478
Exercisable, Common Shares	52,771
Weighted Average Exercise Share Price
Beginning balance	$ 26.22
Granted	38.15
Exercised	21.24
Forfeited	36.19
Expired	42.48
Ending balance	29.61
Exercisable Weighted Average Exercise Price	25.36
Weighted average fair value of options granted during the year	$ 11.73	$ 13.42
Weighted Average Contractual Remaining Life(Years)
Balance at end of period	3 years 11 months
Exercisable at end of period	2 years 11 months
Beginning balance	$ 1,160
Exercised	367
Ending balance	837
Exercisable, Intrinsic Value	$ 749