OTHER OPERATING EXPENSES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
OTHER OPERATING EXPENSES
Professional fees	$ 12,089	$ 10,936	$ 11,117
Travel and entertainment	7,004	6,461	4,267
Rent	6,404	5,943	5,077
Marketing and preferred broker	5,607	4,599	3,693
Office expenses	4,539	4,103	3,537
All other	5,695	6,465	7,140
Total	$ 41,338	$ 38,507	$ 34,831