STOCK-BASED COMPENSATION Stock Option Activity (Detail)	9 Months Ended
	Sep. 30, 2016 $ / shares shares
Number of Shares
Options outstanding at beginning of period (in shares) | shares	2,332,889
Granted (in shares) | shares	0
Exercised (in shares) | shares	(60,050)
Cancelled (in shares) | shares	(1,000,167)
Options outstanding at end of period (in shares) | shares	1,272,672
Option Exercise Price
Granted, lower limit (in dollars per share)	$ 0
Granted, upper limit (in dollars per share)	0
Exercised, lower limit (in dollars per share)	5.0
Exercised, upper limit (in dollars per share)	9.25
Cancelled, lower limit (in dollars per share)	5
Cancelled, upper limit (in dollars per share)	17.71
Weighted Average Exercise Price
Granted (in dollars per share)	0.00
Exercised (in dollars per share)	6.41
Cancelled (in dollars per share)	$ 13.59