INCOME TAXES - Uncertain Tax Positions (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Unrecognized tax benefits [Abstract]
Unrecognized tax benefits, beginning of year	$ 20,413,000	$ 16,480,000
Gross increases - tax positions in prior period	2,003,000	3,027,000
Gross decreases - tax positions in prior period	(762,000)	(376,000)
Gross increases - current period tax positions	718,000	1,282,000
Unrecognized tax benefits, end of year	22,372,000	20,413,000
Unrecognized tax benefits that would impact income tax expense	5,600,000
Accrued interest and penalties	100,000
Income taxes payable noncurrent	1,100,000
Minimum [Member]
Unrecognized tax benefits [Abstract]
Reserves reversed related to uncertain tax positions	0
Maximum [Member]
Unrecognized tax benefits [Abstract]
Reserves reversed related to uncertain tax positions	$ 2,000,000