NET INCOME PER SHARE (DILUTED SHARES TABLE) (DETAILS) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Shares used in basic earnings per share calculation	49,351	51,861	49,696	52,104
Effect of dilutive securities:
Stock options	425	411	419	403
Restricted stock units	335	356	421	405
Performance-based restricted stock units	0	0	0	0
Total effects of dilutive securities	760	767	840	808
Shares used in dilutive earnings per share calculation	50,111	52,628	50,536	52,912