STOCK-BASED COMPENSATION Stock Option Activity (Detail)	3 Months Ended
	Mar. 31, 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	(16,000)
Cancelled (in shares) | shares	(215,711)
Options outstanding at end of period (in shares) | shares	2,101,178
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)	5.5
Cancelled, lower limit (in dollars per share)	5
Cancelled, upper limit (in dollars per share)	17.11
Weighted Average Exercise Price
Granted (in dollars per share)	0.00
Exercised (in dollars per share)	5.39
Cancelled (in dollars per share)	$ 12.87