INCOME TAXES - Expense (Details) - USD ($) $ in Thousands	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal													$ 36,147	$ 38,431	$ 32,181
State													5,479	6,107	6,271
Total current													41,626	44,538	38,452
Deferred:
Federal													(39,712)	(12,596)	(10,362)
State													109	(1,487)	(1,884)
Total deferred													(39,603)	(14,083)	(12,246)
Provision for income taxes from continuing operations	$ 1,267	$ (10,054)	$ 10,832	$ (22)	$ 13,077	$ 9,815	$ 6,688	$ 875	$ 10,810	$ 7,563	$ 756	$ 17,378	2,023	30,455	26,206
Income tax benefit attributable to discontinued operations													$ 8,914	$ 3,357	$ 80