INCOME TAXES (Summary of Provision for Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Federal:
Current	$ 3,878	$ 658
Deferred	(2,076)	527
Federal income tax expense	1,802	1,185
State:
Current	1,002	172
Deferred	(433)	78
State income tax expense	569	250
Total income tax expense	$ 2,371	$ 1,435