STOCK OPTIONS (Details 3) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Summary of option activity - Shares
Outstanding at the beginning of year (in shares)	2,606,737
Granted (in shares)	131,250
Forfeited (in shares)	(42,160)
Exercised (in shares)	(91,148)
Outstanding at the end of period (in shares)	2,604,679
Vested at the end of period (in shares)	1,165,942
Summary of option activity - Weighted Average Exercise Price
Outstanding at the beginning of year (in dollars per shares)	$ 6.58
Granted (in dollars per shares)	$ 12.08
Forfeited (in dollars per shares)	$ 9.54
Exercised (in dollars per shares)	$ 5.25
Outstanding at the end of period (in dollars per shares)	$ 6.85
Vested at the end of period (in dollars per share)	$ 5.93
Option activity disclosures
Weighted Average Remaining Contractual Term - Outstanding	7 years 6 months 4 days
Weighted Average Remaining Contractual Term - Vested	5 years 8 months 1 day
Aggregate Intrinsic Value - Outstanding (in dollars)	$ 13,330
Aggregate Intrinsic Value - Vested (in dollars)	7,031
Stock Option
Weighted average grant-date fair value of options granted	$ 10.49
Total fair value of options vested	2,053
Total unrecognized compensation expense, related to non-vested share-based compensation arrangements	$ 6,235
Period for unrecognized compensation expense is estimated to be recognized	2 years 9 months 11 days