INCOME TAXES (Summary of Provision for Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Federal:
Current	$ (10,433)	$ 5,040	$ (2,275)	$ 11,016
Deferred	10,709	1,194	8,222	5,982
Federal income tax expense	276	6,234	5,947	16,998
State:
Current	(1,960)	665	(613)	1,760
Deferred	1,786	155	1,260	761
State income tax expense	(174)	820	647	2,521
Total income tax expense	$ 102	$ 7,054	$ 6,594	$ 19,519