Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 37,729	$ 25,224	$ 46,908	$ 57,070
Interest rate swaps:
Reclassification adjustments for losses included in net income (interest expense)	127	42	274	85
Gains arising during the period on interest rate swaps	517		1,030
Total other comprehensive income	644	42	1,304	85
COMPREHENSIVE INCOME	$ 38,373	$ 25,266	$ 48,212	$ 57,155