ACQUISITIONS, Supplemental Pro Forma Financial Information (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Supplemental Pro Forma Financial Information [Abstract]
Expenses related to conversion of systems and other costs of integration, as well as certain one-time costs		$ 14,000
Total revenue, net of interest expense, actual	$ 3,667
Net income (loss), actual	$ (3,905)
Total revenue, net of interest expense, pro forma		426,541	$ 416,713
Net income (loss), pro forma		$ 96,894	$ 85,665