Other Operating Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
OTHER OPERATING EXPENSES
Professional fees	$ 10,936	$ 11,117	$ 11,997
Travel and entertainment	6,461	4,267	4,442
Rent	5,943	5,077	6,072
Marketing and preferred broker	4,599	3,693	3,873
Office expenses	4,103	3,537	3,676
All other	6,465	7,140	7,505
Total	$ 38,507	$ 34,831	$ 37,565