ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Numerator:
Net loss attributable to common stockholders	$ (18,106)	$ (79,242)
Denominator:
Denominator for basic net loss per share - weighted-average outstanding shares	49,861,964	49,994,974
Effect of dilutive securities:
Stock options and restricted stock	0	0
Denominator for diluted net loss per share - weighted-average outstanding shares	49,861,964	49,994,974
Net loss attributable to common stockholders per share -basic (in dollars per share)	$ (0.36)	$ (1.58)
Net loss attributable to common stockholders per share -diluted (in dollars per share)	$ (0.36)	$ (1.58)