INCOME TAXES: (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Statutory tax (@ 35% rate)	$ (7,260)	$ 27,912	$ (7,832)
Effect of state taxes, net of federal	(450)	4,331	(613)
Effect of state rate and tax law changes	407	750	101
Other permanent items	149	1	77
Interest disallowed under Internal Revenue Code section 162(i)	5,364	8,825	765
Effect of equity adjustments including ASC 718	0	5	45
Internal Revenue Code section 162(m)	1,012	2,226	2,504
Valuation allowance	34,644	14,861	3,145
Effect of permanent impairment of long-lived assets	0	4,540	5,735
Expiring NOLs and charitable carryovers	137	1,037	454
Forfeiture of stock-based compensation	163	1,151	(255)
Uncertain tax positions	(709)	0	0
Other	(222)	1,047	(155)
Provision for income taxes	$ 33,235	$ 66,686	$ 3,971