SHARE-BASED COMPENSATION Stock Option Activity (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options, Exercisable, Number (shares)	724,850	879,810	1,193,911	1,965,633
Number of Shares
Options outstanding at beginning of period (in shares)	879,810	1,236,222	2,332,889
Options granted in the period (shares)	0	0	0
Exercised (in shares)	(75,836)	(34,862)	(82,550)
Cancelled (in shares)	(79,124)	(321,550)	(1,014,117)
Options outstanding at end of period (in shares)	724,850	879,810	1,236,222
Option Exercise Price
Exercised, lower limit (in dollars per share)	$ 5.00	$ 5.00	$ 5.00
Exercised, upper limit (in dollars per share)	9.25	10.00	11.99
Cancelled, lower limit (in dollars per share)	5.00	5.50	5.00
Cancelled, upper limit (in dollars per share)	17.11	17.11	17.71
Weighted Average Exercise Price
Exercised (in dollars per share)	5.28	6.37	6.50
Cancelled (in dollars per share)	$ 10.63	$ 13.07	$ 13.62