INCOME TAXES (Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current Federal, State and Local, Tax Expense (Benefit) [Abstract]
Current Federal Tax Expense (Benefit)													$ 29,787	$ 24,683	$ 23,411
Current State and Local Tax Expense (Benefit)													2,477	1,399	1,444
Current													32,264	26,082	24,855
Deferred Federal, State and Local, Tax Expense (Benefit) [Abstract]
Deferred Federal Income Tax Expense (Benefit)													9,908	(3,310)	2,764
Deferred State and Local Income Tax Expense (Benefit)													2,083	(23)	(567)
Deferred													11,991	(3,333)	2,197
Provision for (benefit from) income taxes	$ 11,943	$ 12,277	$ 10,841	$ 9,194	$ 3,308	$ 6,642	$ 6,615	$ 6,184	$ 5,831	$ 7,284	$ 8,696	$ 5,241	$ 44,255	$ 22,749	$ 27,052