STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE - Share-based Compensation Plans Narrative (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended		3 Months Ended			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 Stock Plan 1998 [Member]	Jun. 30, 2010 Stock Plan 2000 [Member]	Dec. 31, 2013 Stock Plan 2000 [Member]	Dec. 31, 2013 Stock Plan 2012 [Member]	Dec. 31, 2013 Employee stock options [Member]	Dec. 31, 2013 Restricted Stock [Member]	Dec. 31, 2013 Restricted Stock [Member] Minimum [Member]	Dec. 31, 2013 Restricted Stock [Member] Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options issue price as percentage of fair value	100.00%
Stock options issue price as percentage of fair value, certain circumstances	110.00%
Expiration period - beginning						7 years
Expiration period - ending		10 years				10 years
Vesting period						4 years		3 years	4 years
Award vesting rights (in shares)							1
Options available for future grants (in shares)	4,684,000
Number of shares authorized under plan (in shares)		3,600,000		16,200,000	2,000,000
Additional shares authorized (in shares)			4,500,000
Unrecognized share-based compensation expense	$ 16.0
Weighted-average term of unrecognized share-based compensation expense	2 years 5 months 8 days