INCOME TAXES (Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current Federal, State and Local, Tax Expense (Benefit) [Abstract]
Current Federal Tax Expense (Benefit)													$ 21,869	$ 30,961	$ 29,787
Current State and Local Tax Expense (Benefit)													4,130	3,085	2,477
Current													25,999	34,046	32,264
Deferred Federal, State and Local, Tax Expense (Benefit) [Abstract]
Deferred Federal Income Tax Expense (Benefit)													2,021	58,646	9,908
Deferred State and Local Income Tax Expense (Benefit)													575	(2,204)	2,083
Deferred													2,596	56,442	11,991
Provision for (benefit from) income taxes	$ 3,053	$ 8,084	$ 9,219	$ 8,239	$ 54,986	$ 10,883	$ 12,791	$ 11,828	$ 11,943	$ 12,277	$ 10,841	$ 9,194	$ 28,595	$ 90,488	$ 44,255