INCOME TAXES: (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
INCOME TAXES:
Provision for income taxes - continuing operations	$ 41,249	$ 67,852	$ 44,785
(Benefit) provision for income taxes - discontinued operations	(10,806)	663	477
Income tax expense (benefit)	30,443	68,515	45,262
Current:
Federal	16,229	56,106	678
State	(8,305)	4,095	1,055
Current income tax expense (benefit)	7,924	60,201	1,733
Deferred:
Federal	20,214	9,151	41,361
State	2,305	(837)	2,168
Deferred income tax expense (benefit)	22,519	8,314	43,529
Income tax expense (benefit)	$ 30,443	$ 68,515	$ 45,262